Patents by Inventor Richard M. Stern

Richard M. Stern has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5026735
    Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: June 25, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard M. Stern
  • Patent number: 5025052
    Abstract: Fluorochemical oxazolidinones compositions are provided. They ar normally solid, water-insoluble, fluoroaliphatic radical-containing 2-oxazolidinone compounds which have one or more 2-oxazolidinone moieties, at least one of which has a monovalent fluoroaliphatic radical bonded to the 5-position carbon atom thereof by an organic linking group.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: June 18, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Davis H. Crater, Richard D. Howells, Richard M. Stern, John A. Temperante
  • Patent number: 4923903
    Abstract: Air is mechanically entrained in a dyed or colored, aqueous solution comprising surfactant, poly(oxyalkylene) polyisocyanate prepolymer and the reaction product of said prepolymer and one or more isocyanate-reactive dyes, the poly(oxyalkylene) portion of said prepolymer containing sufficient oxyethylene units to render the prepolymer and the reaction product water-soluble and hydrophilic, to form a dyed or colored, fluid, aqueous air foam which is sprayed or otherwise applied to exposed surface of a substrate, e.g. a sanitary landfill, the applied foam gelling or increasing in viscosity, due to the polymerization, e.g.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: May 8, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Roger R. Alm, Richard M. Stern
  • Patent number: 4795764
    Abstract: Air is mechanically entrained in an aqueous solution of surfactant, polyamine reactant, and low moisture sensitive poly(oxyalkylene) poly(aliphatic isocyanate) prepolymer the poly(oxyalkylene) portion of which contains sufficient oxyethylene units to render the prepolymer water-soluble and hydrophilic, to form a fluid, water-based, air foam which is sprayed or otherwise applied to exposed surface of a substrate, such as a body of hazardous material, the applied foam gelling or increasing in viscosity, due to reaction of the polyisocyanate prepolymer with the polyamine in the presence of the water to form a poly(oxyalkylene) polyurea polymer containing polyurylene-containing segments formed from the reaction, and forming a persistent gelled air foam or viscous air foam in the form of a coating on the exposed surface, thus sealing or otherwise protecting or controlling the substrate.
    Type: Grant
    Filed: June 1, 1987
    Date of Patent: January 3, 1989
    Assignee: Minnesota Mining & Manufacturing Company
    Inventors: Roger R. Alm, Irvin F. Dunsmore, Richard M. Stern
  • Patent number: 4736365
    Abstract: A method and apparatus for communication circuit acquisition in an information processing system for high throughput communication of digital information is disclosed. High throughput is achieved by providing acquire logic circuitry for acquiring a communication circuit among a multiplicity of communication circuits, which are preferably four-wire, full duplex bidirectional channels for serial communication of digital information, and by preferably providing full duplex, bidirectional communication of messages at a first rate and half duplex, unidirectional communication of large blocks of data at a second higher rate over the communication circuits. The acquire logic circuitry frees the processor included in a communication controller associated with each information processing element to perform other data processing functions so that the processor is not burdened by monitoring the availability of the communication circuits for transmission of digital information.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: April 5, 1988
    Assignee: Dialogic Systems Corporation
    Inventor: Richard M. Stern
  • Patent number: 4691016
    Abstract: The compounds 8-bromo-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo[ij]quinolizine-2-c arboxylic acid and 8-chloro-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo[ij]quinolizine-2- carboxylic acid are disclosed as potent antimicrobials. Pharmaceutically-acceptable carboxylate salts, acyl chlorides, esters and alkylaminoalkyl ester salts of the acids are also disclosed.
    Type: Grant
    Filed: August 22, 1985
    Date of Patent: September 1, 1987
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4675320
    Abstract: Antimicrobial 2-nitro-3-phenylbenzofurans wherein the benzo or the 3-phenyl portion of the molecule is bonded to an alkylene or an oxyalkylene group which is in turn bonded to a basic nitrogen atom or to the nitrogen atom of an (N-lower alkanoyl)amino group.
    Type: Grant
    Filed: May 15, 1985
    Date of Patent: June 23, 1987
    Assignee: Riker Laboratories, Inc.
    Inventors: Robert A. Scherrer, Richard M. Stern, Walton J. Hammar
  • Patent number: 4606737
    Abstract: Fluorochemical allophanates containing one or more monovalent fluoroaliphatic radicals having at least three fully fluorinated terminal carbon atoms and one or more allophanate moieties, the radicals and moieties bonded together by hetero atom-containing or organic linking groups are provided. These fluorochemical allophanates are useful in the form of aqueous dispersions or emulsions or organic solutions in the treatment of fibrous substrates, such as textile fibers, to impart oil and water repellency.
    Type: Grant
    Filed: June 26, 1984
    Date of Patent: August 19, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard M. Stern
  • Patent number: 4603199
    Abstract: Antimicrobial compounds of the following formula are disclosed: ##STR1## wherein X is selected from the group consisting of --O--, --CH.sub.2 and ##STR2## m is 0 or 1; R.sub.1 is selected from the group consisting of hydrogen, nitro, amino, lower alkyl, lower alkanamido, lower N,N-dialkylamino, formamido, hydroxy, lower alkoxy, halogen, lower haloalkanamido and pyrryl; n is 1 or 2; and R.sub.2 is selected from the group consisting of hydrogen, methyl, fluoro, chloro and nitro. Acyl chlorides, esters, alkylaminoalkyl ester salts, amides and pharmaceutically acceptable carboxylate salts are also disclosed. Pharmaceutical compositions containing these compounds, methods of using these compound and synthetic intermediates are also disclosed.
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: July 29, 1986
    Assignee: Riker Laboratories, Inc.
    Inventors: John F. Gerster, Richard M. Stern
  • Patent number: 4585868
    Abstract: The compounds 5-carboxyl-6-fluoroquinaldine, 6-fluoro-5-methylquinaldine, 6-fluoro-5-methyl-1,2,3,4-tetrahydroquinaldine, 1,2-dihydro-6-fluoro-5-hydroxymethylquinaldine and diethyl 2-[N-(6-fluoro-5-methyl-1,2,3,4-tetrahydroquinaldinyl)]methylenemalonate are disclosed as useful intermediates for preparing the antimicrobial agent 6,7-dihydro-5,8-dimethyl-9-fluoro-1-oxo-1H,5H-benzol[ij]quinolizine- 2-carboxylic acid.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: April 29, 1986
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4568750
    Abstract: The compounds 5-bromo-6-fluoroquinaldine, 5-bromo-6-fluoro-1,2,3,4-tetrahydroquinaldine, 1-acetyl-5-bromo-6-fluoro-1,2,3,4-tetrahydroquinaldine and diethyl 2-[N-(6-fluoro-5-methoxy-1,2,3,4-tetrahydroquinaldinyl)]-methylenemalonate are intermediates for preparing antimicrobial 8-alkoxy-6,7-dihydro-5-methyl-9-fluoro-1-oxo-1H,5H-benzo[ij]-quinolizine-2 -carboxylic acids.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: February 4, 1986
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4556713
    Abstract: The compounds 8-bromo-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo[ij]quiniolizine-2- carboxylic acid and 8-chloro-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H,-benzo[ij]quinolizine-2 -carboxylic acid are disclosed as potent antimicrobials. Pharmaceutically-acceptable carboxylate salts, acyl chlorides, esters and alkylaminoalkyl ester salts of the acids are also disclosed.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: December 3, 1985
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4526896
    Abstract: Antimicrobial 2-nitro-3-phenylbenzofurans wherein the benzo or the 3-phenyl portion of the molecule is bonded to an alkylene or an oxyalkylene group which is in turn bonded to a basic nitrogen atom or to the nitrogen atom of an (N-lower alkanoyl)amino group.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: July 2, 1985
    Assignee: Riker Laboratories, Inc.
    Inventors: Robert A. Scherrer, Richard M. Stern, Walton J. Hammar
  • Patent number: 4524148
    Abstract: The compounds 8-bromo-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo[ij]quiniolizine-2- carboxylic acid and 8-chloro-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H,-benzo[ij]quinolizine-2 -carboxylic acid are disclosed as potent antimicrobials. Pharmaceutically-acceptable carboxylate salts, acyl chlorides, esters and alkylaminoalkyl ester salts of the acids are also disclosed.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: June 18, 1985
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4472407
    Abstract: The 8-alkoxy-6,7-dihydro-5-methyl-9-fluoro-1-oxo- 1H,5H-benzo[ij]quinolizine-2-carboxylic acids are disclosed as potent antimicrobial agents with a broad spectrum of activity. Esters, acyl chlorides, amides, alkylaminoalkyl ester salts and pharmaceutically acceptable carboxylate salts are also disclosed. Methods of using these compounds, pharmaceutical compositions comprising these compounds and synthetic intermediates for preparing these compounds are also described.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: September 18, 1984
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4472405
    Abstract: The compound 6,7-dihydro-5,8-dimethyl-9-fluoro-1-oxo-1H,5H-benzo[ij]quinolizine-2-carbo xylic acid is disclosed as a potent antimicrobial agent with a broad spectrum of activity. Esters, acyl chlorides, alkylaminoalkyl ester salts and pharmaceutically acceptable carboxylate salts of the acid are also disclosed. Methods of using these compounds, pharmaceutical compositions comprising these compounds and synthetic intermediates for preparing these compounds are described.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: September 18, 1984
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4443447
    Abstract: Antimicrobial compounds of the following formula are disclosed: ##STR1## wherein X is selected from the group consisting of --O--, --CH.sub.2 and ##STR2## m is 0 or 1; R.sub.1 is selected from the group consisting of hydrogen, nitro, amino, lower alkyl, lower alkanamido, lower N,N-dialkylamino, formamido, hydroxy, lower alkoxy, halogen, lower haloalkanamido and pyrryl; n is 1 or 2; and R.sub.2 is selected from the group consisting of hydrogen, methyl, fluoro, chloro and nitro. Acyl chlorides, esters, alkylaminoalkyl ester salts, amides and pharmaceutically acceptable carboxylate salts are also disclosed. Pharmaceutical compositions containing these compounds, methods of using these compound and synthetic intermediates are also disclosed.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: April 17, 1984
    Assignee: Riker Laboratories, Inc.
    Inventors: John F. Gerster, Richard M. Stern
  • Patent number: 4404207
    Abstract: Antimicrobial compounds of the following formula are disclosed: ##STR1## wherein Het is selected from the goup consisting of pyrryl, pyrrolidyl, tetrazolyl of the formula ##STR2## wherein R.sup.1 is lower alkyl or benzyl and oxadiazolyl of the formula ##STR3## wherein R.sup.2 is lower alkyl, trifluoromethyl or --NH.phi.--; X is hydrogen and when Het is pyrryl or pyrrolidyl, X may be fluorine. Pharmaceutically acceptable carboxylate salts and esters of the acids are also disclosed.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: September 13, 1983
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4400386
    Abstract: This invention relates to antimicrobial compounds of the formula ##STR1## wherein X is hydrogen or fluorine; Y is selected from the group consisting of ##STR2## and ester, carboxylate salts, and alkylaminoalkyl ester salts thereof.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: August 23, 1983
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern
  • Patent number: 4380543
    Abstract: The compounds 8-cyano-6,7-dihydro-5-methyl-1-oxo-1H,5H-benzo[ij]quinolizine-2-carboxylic acid and 8-cyano-6,7-dihydro-9-fluoro-5-methyl-1-oxo-1H,5H-benzo[ij]quinolizine-2-c arboxylic acid are disclosed as potent antimicrobial agents. Pharmaceutically-acceptable carboxylate salts, esters, acyl chlorides, amides and alkylaminoalkyl ester salts of the acids are also disclosed.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: April 19, 1983
    Assignee: Riker Laboratories, Inc.
    Inventor: Richard M. Stern