Easy To Use Patents Search & Patent Lawyer Directory

At Patents you can conduct a Patent Search, File a Patent Application, find a Patent Attorney, or search available technology through our Patent Exchange. Patents are available using simple keyword or date criteria. If you are looking to hire a patent attorney, you've come to the right place. Protect your idea and hire a patent lawyer.

Searching: chemistry





Search by keyword, patent number, inventor, assignee, city or state:




Patent # Description
US-4,820,545 Method of bonding ceramic orthodontic appliances
A method of enhancing the bondability of ceramic orthodontic brackets or other dental attachments for improving the bonding strength between such attachments and...
US-4,819,711 Compactability and permeability control for fabricating ECP mold
A method of controlling, during the act of mold fabrication in real time, the compactability and permeability of a sand mold containing an evaporative foam...
US-4,812,569 Chromogenic phthalides
Chromogenic phthalides of the general formula ##STR1## wherein R.sub.1 and R.sub.2 independently of one another denote hydrogen, alkyl, alkenyl, aralkyl,...
US-4,806,654 Processes for the preparation of benzo(chalcogeno)(4,3,2-cd)indazoles and intermediates thereof
Improved processes for producing substituted benzo(chalcogeno)[4,3,2-cd] indazoles. The processes produce compounds in higher yields and of greater purity by...
US-4,804,475 Metallized membrane systems
Polymer membranes metallized by wet chemistry are highly suitable, for example, for the separation of inert, reactive and fermentation gases. The metallization is...
US-4,801,886 Mounting means for water chemistry analysis device
An improved method of attachment of a pH or p sensor in the recirculation/filtration line for a pool or spa or for forming a T-connection between any two pipes...
US-4,800,220 Crosslinked carboxylic copolymers usable as thickeners in aqueous media and preparation thereof
The invention relates to the chemistry of polymers and to cross-linked carboxylic copolymers obtained by copolymerization of an unsaturated carboxylic monomer, a...
US-4,798,655 Multiparameter analytical electrode structure and method of measurement
An ion sensitive electrode device and method of its use in analytical and clinical chemistry are provided for measuring the concentration of an ionizable analyte...
US-4,795,880 Low pressure chemical vapor deposition furnace plasma clean apparatus
Cleaning of low pressure chemical vapor deposition (LPCVD) furnaces is accomplished "in-situ" at furnace operating temperatures. Radio frequency (RF) power is...
US-4,794,070 Automatically processible photographic element comprising a non-silver halide layer containing bromide
Automatic processing equipment for photographic film, particularly radiographic black-and-white film, are required to handle different brands and constructions...
US-4,790,979 Test strip and fixture
A test strip is disclosed which provides for transport and separation of heterogenous fluid samples. This test strip can be used for analysis of whole blood by...
US-4,789,426 Process for performing variable selectivity polysilicon etch
A method for controllably varying the selectivity of reactive etching process for etching a polysilicon film, involves the addition of an adjustable amount of...
US-4,787,398 Glucose medical monitoring system
Hand-held shirt-pocket portable glucose medical monitoring system for checking measurement of blood glucose or other body qualities. The system includes a...
US-4,786,729 Benzimidazolo-quinazolines
Benzimidazolo-quinazolines of the general formula ##STR1## in which Y denotes a radical of the formula ##STR2## Y.sub.1 denotes hydrogen or alkyl, X...
US-4,786,394 Apparatus for chemical measurement of blood characteristics
A clinical chemistry analyzer system for blood chemistry analysis is disclosed. Two major parts comprise the system. One part is a discardable sensor cartridge...
US-4,785,642 Decorative clip with perfume dispenser
A decorative clip for use as a jewelry item is disclosed which shines and glitters in the dark and emits perfume. This shining and glittering effect is achieved...
US-4,783,196 Highly concentrated stable solutions of color-forming agents: for pressure-sensitive recording materials
Highly concentrated stable solutions of color-forming agents of the general formula ##STR1## wherein x denotes hydroxyl, alkoxy, alkenyloxy, aralkoxy,...
US-4,781,358 Apparatus for monitoring an article in sintering furnace
An apparatus for measuring and regulating the variable pressure furnace gas chemistry is described. The apparatus uses a mass spectrometer for measurements, in...
US-4,777,288 Process for preparing a 4,4-diphenylbutanoic acid derivative
A novel three-step process for preparing 4-(3,4-dichlorophenyl)-4-phenylbutanoic acid is disclosed, which involves (1) reducing...
US-4,775,558 Polyurethanes prepared or combined with another material and a process for their manufacture
Polyurethanes which have been prepared or combined with another material are made by combining or applying a polyurethane-forming reaction mixture or...
US-4,775,448 Isolation process
A process of isolating dihydroxyacetone which is a useful intermediate in organic chemistry as well as being a sun-tanning agent. The process comprises passing a...
US-4,774,192 A dry reagent delivery system with membrane having porosity gradient
Dry chemistry reagent system, kit and method for detection of an analyte such as glucose, cholesterol, urea, antigen or antibody. The reagent system is a porous...
US-4,772,791 Neuroreceptor activity assessment
The effectiveness of drugs and substances that affect brain chemistry can be efficiently and relatively inexpensively monitored. Radioactive tracer substances...
US-4,766,550 Automatic on-line chemistry monitoring system
A system for automatically sampling, monitoring and analyzing power plant steam cycle water supplied from various points in a power plant steam cycle system as a...
US-4,765,781 Coal slurry system
A slurry of liquified gas such as carbon dioxide and finely pulverized coal particles is provided in a mixing chamber and discharged from the chamber into a...
US-4,762,003 Material test machine for tension-compression tests at high temperature
Apparatus providing a device for testing the properties of material specimens at high temperatures and pressures in controlled water chemistries includes, inter...
US-D297,165 Automated chemistry analyzer for analysis of blood components or other body fluids
US-4,756,785 Process for the preparation of adhesives and their use for the formation of bonds
The preparation and use of polyurethane-based hot melt adhesives which are cross-linked under the influence of heat comprising reacting (a) a polyisocyanate component...
US-4,754,034 Chromogenic 4,4-diaryldihydroquinazolones
4,4-diaryldihydroquinazolones of the formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3, independently of one another, denote hydrogen, halogen, alkyl,...
US-4,753,896 Sidewall channel stop process
A new way of making sidewall channel stops for silicon on insulator devices (including silicon on oxide, silicon on nitride, and silicon on sapphire devices)....
US-4,752,740 Electronic water chemistry analysis device with linear bargraph readouts
An improved water analysis system for pools, spas, and the like. An oxidation-reduction potential (ORP) sensor is disposed in the recirculation/filtration system...
US-4,749,648 Agent for the determination of esterolytic and/or proteolytic enzymes
Esters and agents including the esters, useful as substrates for esterolytic and/or proteolytic enzymes, said esters being compounds of the general formula: ...
US-4,746,592 Color correction in negative images using positive imaging chemistry
Color correction of negative images resulting from diffusion transfer photographic recording materials is obtained through use of two dye image-providing...
US-4,740,448 Hybrid color films with dye developer and thiazolidine dye releaser
Diffusion transfer color films and processes are disclosed which use dye developer chemistry to form at least one color record and which use image dye-releasing...
US-4,738,965 2-oxo-4-(2'-difl uoromethylthiophenyl)-5-methoxycarbonyl-6-methyl-1,2,3,4-tetrahydropyrimi dine
The present invention relates to organic chemistry. The novel compound 2-oxo-4-(2'-difluoromethylthiophenyl)-5-methoxycarbonyl-6-methyl-1,2,3,4-t ...
US-4,738,534 Vertical beam spectrophotometer
A vertical beam spectrophotometer for measuring the light absorption of an assay prepared using standard wet chemistry procedures and conventional solid phase...
US-4,731,418 Diels-Alder graft polymers
Graft polymers between glassy polymers and elastomeric polymers prepared using Diels-Alder chemistry are disclosed.
US-4,727,140 Chromogenic 4,4-diaryl-2-oxobenzo-3,1-oxazines
4,4-Diaryl-2-oxobenzo-3,1-oxazines of the general formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3, independently of one another, denote hydrogen,...
US-4,719,085 Mount for ammonia-sensitive test elements
There is described a dry chemistry test element consisting of a chemistry unit and a mount that is ammonia-sensitive, wherein the mount is improved to prevent...
US-4,719,073 Method of monitoring an article in sintering furnace
A process and apparatus for measuring and regulating the variable pressure furnace gas chemistry is described. The method makes use of mass spectrometer...
US-4,718,941 Infiltration processing of boron carbide-, boron-, and boride-reactive metal cermets
A chemical pretreatment method is used to produce boron carbide-, boron-, and boride-reactive metal composites by an infiltration process. The boron carbide or...
US-4,717,607 Method of making a fluorescent lamp
A method of making fluorescent lamps having increased brightness and improved maintenance by changing the surface chemistry of the inside surface of the glass...
US-4,717,448 Reactive ion etch chemistry for providing deep vertical trenches in semiconductor substrates
A process for forming deep (>6.mu.m) trenches in a silicon substrate. The substrate is etched through a silicon oxide mask in a plasma having 75%-86% HCl,...
US-4,715,324 Nuclear steam generator sludge lancing method and apparatus
A method and apparatus for removing from the tube sheet and transfer tubes of a nuclear steam generator sludge deposits which occur from the use of all volatile...
US-4,713,772 Automatic on-line chemistry monitoring system having improved calibration unit
A system for automatically sampling, monitoring and analyzing power plant steam cycle water supplied from various points in a power plant steam cycle system as a...
US-4,713,369 Oligopeptidylargininol derivatives and their homologs, a process for their preparation, their use and agents...
The invention relates to new peptidylargininol derivatives and their homologs of the general formula X being a hydrogen atom or a known protective group customary in...
US-4,712,561 Neuroreceptor activity assessment
The effectiveness of drugs and substances that affect brain chemistry can be efficiently and relatively inexpensively monitored. Radioactive tracer substances...
US-4,708,928 Photothermographic element comprising particles each containing silver halide, a silver compound and reducing agent
Photothermographic imaging chemistry, and particularly color chemistry, can be contained within solid particles. Photothermographic media can then be made by...
US-4,705,841 TBEA linked epoxy-urethanes
Novel epoxy-urethane resins are produced by the reaction of a urethane-alkanolamine adduct with an epoxy resin. The urethane-alkanolamine adduct is prepared by...
US-4,702,879 Nuclear reactor with passive safety system
A pressurized nuclear water reactor has a substantially cylindrical flow liner with a cylindrical wall section and bottom and an open top. A barrel forms a riser...
← Previous | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | Next →

File A Patent Application

  • Protect your idea -- Don't let someone else file first. Learn more.

  • 3 Easy Steps -- Complete Form, application Review, and File. See our process.

  • Attorney Review -- Have your application reviewed by a Patent Attorney. See what's included.