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-4,593,093 Acyl derivatives
There are presented compounds of the formula ##STR1## wherein R.sup.1 is one of the 3-substituents usable in cephalosporin chemistry, R.sup.2 is hydrogen,...
US-4,593,018 Oligopeptide aldehydes useful as specific inhibitors of enterokinase
Compounds of the general formula: ##STR1## wherein n is an integer from 2 to 6, m is an integer from 2 to 4, p is an integer from 1 to 3, R is H, an amino...
US-4,588,810 Basic triphendioxazine dyestuffs
Basic triphendioxazine dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2, independently of each other, each denote hydrogen, halogen, alkyl,...
US-4,585,646 Obtaining silicon compounds by radiation chemistry
Irradiation of a siloxane derives SiO at low temperatures and forms the basis for a closed cycle reforming the siloxane that decomposes water to produce H.sub.2...
US-4,584,022 Cement plant dust recovery system
A process of treating the dust catch from a cement manufacturing operation to produce either cement clinker or an intermediate product suitable for feed to a...
US-4,581,123 Custom blended precursor for carbon artifact manufacture
This invention is based upon a new concept in carbon artifact manufacture, wherein a precursor can be manufactured by blending extracted components of at least...
US-4,573,968 Infusion and blood chemistry monitoring system
A patient infusion and blood chemistry monitoring system is provided for controlled fluid infusion with intermittent interruption for automated drawing of a...
US-4,568,742 Basic triphendioxazine dyestuffs
Basic triphendioxazine dyestuffs of the formula ##STR1## wherein Q denotes the radical ##STR2## or hydrogen, R.sub.1 and R.sub.2, independently of...
US-4,564,388 Method for continuous steelmaking
A method for the continuous operation of an electric steelmaking furnace, including preheating charge materials, charging and tapping while maintaining full...
US-4,563,537 Synthesis of thiophene-containing prostaglandin endoperoxide apparatus
New organopalladium reactions involving the addition of thienylpalladium compounds to strained bicyclic alkenes, and subsequent chain extension reactions...
US-4,551,428 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-4,551,175 Method for controlling slag chemistry in a refining vessel
Method for slag chemistry control in a refractory lined vessel during the process of refining metal by the injection of oxygen gas during a period of oxidation...
US-4,543,124 Apparatus for continuous steelmaking
Apparatus for the continuous making of steel in an electric steelmaking furnace, having a charge material preheater, continuous charging means, and means for...
US-4,539,409 Process for preparing aromatic nitriles
A process is disclosed for preparing coated catalysts, inter alia, for gas phase oxidations in organic chemistry, comprised of an inert support and a coating of...
US-4,535,786 Measurement of body fluid chemistry
A method and apparatus are disclosed in which body fluid chemistry is measured in either differential or nondifferential mode using apparatus of the kind...
US-D280,131 Case for a multiplicity of liquid sample containers for a multitest chemistry analyzer
US-4,533,730 1-Oxadethiacepham compounds
Intermediates for preparing an antibacterial 1-dethia-1-oxacephalosporins which are represented by the following formula: ##STR1## wherein R is a monovalent...
US-4,533,389 Boron containing rapid solidification alloy and method of making the same
A homogeneous boron containing alloy is disclosed with a composition which can be essentially represented by the formula of: M.sub.i T.sub.j B.sub.k where M is a...
US-4,527,240 Balascopy method for detecting and rapidly evaluating multiple imbalances within multi-parametric systems
In a system in which multiple related parameters, such blood chemistry data, are to be evaluated, such evaluation is facilitated by converting the data into...
US-4,523,950 Boron containing rapid solidification alloy and method of making the same
A homogeneous boron containing alloy is disclosed with a composition which can be essentially represented by the formula of: M.sub.i T.sub.j B.sub.k where M is a...
US-4,523,484 Dilution pipetter
A dilution pipetter comprising a diluent sucking probe, a sample probe for sucking and discharging a liquid sample, a diluent discharging probe disposed adjacent...
US-4,521,618 Process for preparing acrylic or methacrylic acid
A process is disclosed for preparing coated catalysts, inter alia, for gas phase oxidations in organic chemistry, comprised of an inert support and a coating of...
US-4,521,275 Plasma etch chemistry for anisotropic etching of silicon
A plasma etch chemistry which allows a near perfectly vertical etch of silicon is disclosed. A Cl-containing compound such as BCl.sub.3 has Br.sub.2 added to it,...
US-4,520,207 Synthesis of thiophene-containing prostaglandin endoperoxide analogs
New organopalladium reactions involving the addition of thienylpalladium compounds to strained bicyclic alkenes, and subsequent chain extension reactions...
US-4,520,185 Alkanolamine linked epoxy-urethanes
Novel epoxy-urethane resins are produced by the reaction of an epoxy-alkanolamine adduct and a urethane prepolymer. The epoxy-alkanolamine adduct is prepared by...
US-4,519,541 Torch flame spray system
A flame spray system comprising a torch is provided having a gas mixing chamber and means for feeding acetylene and oxygen to the mixing chamber in a preselected...
US-4,515,792 Tetracyclic heterocycles and antidepressant compositions thereof
Tetracyclic heterocycles of the formula ##STR1## wherein Th is the residue completing a fused thiophen ring, X represents oxo, hydroxyl together with...
US-4,512,645 Film processor tank with tank divider
An improved film processor tank for processing photographic film and paper. The tank characterized by having an integrally formed round bottom with a contoured...
US-4,508,644 Chromogenic compounds, a process for their preparation and their use
Chromogenic compounds of the formula I ##STR1## and a process for their preparation are described, X denoting a hydrogen atom, a protective group...
US-4,507,232 Peptide derivatives
This invention is directed to novel peptide derivatives. Said peptide derivatives are useful as a substrate for the activity assay of enzymes of the group EC 3....
US-4,504,658 Epimerization of malonic acid esters
A compound represented by the formula (II) epimerizes by the action of a base and the product is precipitated for shifting the equilibrium to yield the...
US-4,499,038 Process for the production of microcellular moldings from diisocyanate and compounds containing groups obtained...
The present invention is directed to a process for the production of polyurea-based microcellular moldings comprising reacting (a) at least one diisocyanate or...
US-4,497,734 Asymmetrical 1:2 chromium complexes derived from azo and azomethine dyes
Asymmetrical 1:2 chromium complex dyestuffs which, in the form of the free acid, correspond to the formula ##STR1## wherein X represents CO or a direct bond...
US-4,490,209 Plasma etching using hydrogen bromide addition
The disclosure relates to a plasma etch chemistry which allows a near perfectly anisotropic etch of silicon. A Cl-containing compound such as HCl has HBr added...
US-4,474,967 8-Deutero and 8-tritio-substituted derivatives of D-4S-6-fluoro-spiro-[chroman-4,4'-imidazolidine]-2',5'-dione
The 8-deutero, and 8-tritio-substituted derivatives of D-4S-6-fluoro-spiro-[chroman-4,4'-imidazolidine]-2',5'-dione (sorbinil) have been prepared. These...
US-4,469,683 3"-Epistreptomycin and its dihydro derivative, pharmaceutical compositions and production of the same
New semi-synthetic antibiotics, 3"-epistreptomycin and 3"-epidihydrostreptomycin are now provided, which are useful as antibacterial agents....
US-4,469,574 Process and automated device for laser-induced chemistry
This invention relates to an automated apparatus for use with electromagnetic radiation, such as a laser beam, to promote chemical reactions. The reaction...
US-4,469,564 Copper electroplating process
A copper electroplating process is described in which the anode is surrounded by a cation-permeable membrane so as to prevent decomposition of additives in the...
US-4,467,115 Method for preparing branched polyethylenimine
The present invention relates to the chemistry of polymers and, more specifically, to a method for preparing of branched polyethylenimine. The method of this...
US-4,464,206 Wrought P/M processing for prealloyed powder
A process for producing a wrought product of improved ductility from substantially noncompactible prealloyed metal powder. The process comprises the steps of:...
US-4,458,072 Acyl derivatives
There are presented compounds of the formula ##STR1## wherein R.sup.1 is one of the 3-substituents usable in cephalosporin chemistry, R.sup.2 is hydrogen,...
US-4,456,769 Preparation of hydrazidines
A new one-step process for the preparation of hydrazidines of the general formula ##STR1## in which R represents an optionally substituted alkyl group, an...
US-4,450,042 Plasma etch chemistry for anisotropic etching of silicon
A plasma etch chemistry which allows a near perfectly vertical etch of silicon is disclosed. A Cl-containing compound such as BCl.sub.3 has Br.sub.2 added to it,...
US-4,446,326 Cationic naphtholactam dyestuffs
Cationic dyestuffs of the general formula ##STR1## wherein R represents hydrogen or an alkyl radical with a maximum of 8 C atoms, which is optionally...
US-4,443,629 Preparation of hydrazidines
A one-step process for the preparation of hydrazidines of the general formula ##STR1## in which R represents an optionally substituted alkyl group, an...
US-4,443,598 1-Oxadethiacepham compounds
Intermediates for preparing an antibacterial 1-dethia-1-oxacephalosporins which are represented by the following formula: ##STR1## wherein R is a monovalent...
US-4,443,254 Cobalt free maraging steel
The subject invention is directed to ferrous-base alloys, particularly to a cobalt-free maraging steel of novel chemistry characterized by a desired combination...
US-4,442,236 Process for the production of molded articles
A process for the production of optionally cellular molded articles with a smooth outer skin and improved surface characteristics by the reaction, inside a...
US-4,436,934 Bicyclic prostaglandin analogs and method of synthesis
New organopalladium reactions involving the addition of pi-allylpalladium compounds to strained bicyclic alkenes, and subsequent chain extension reactions...
US-4,435,808 Production of radiation at frequencies of preselected absorbing resonances and methods using same
Radiation at the frequency of a preselected absorbing resonance is produced by use of split and recombined interfering optical paths, arranged to produce near...
← 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 74 75 | 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.