Patents Represented by Attorney Jack W. Richards
  • Patent number: 4473579
    Abstract: Tetrasubstituted urea and thiourea compounds useful as antiatherosclerotic agents, compositions thereof and processes for their preparation.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: September 25, 1984
    Assignee: American Cyanamid Company
    Inventors: Vern G. Devries, Ransom B. Conrow
  • Patent number: 4450272
    Abstract: This disclosure describes 4-heteroaryl-1-piperazinethiocarboxamides useful in the treatment of atherosclerosis in mammals.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: May 22, 1984
    Assignee: American Cyanamid Company
    Inventors: Mila T. Du, Robert G. Shepherd
  • Patent number: 4407946
    Abstract: This invention relates to a novel process for the production of antibiotic X-14868A using the novel microorganism Antinomadura yumaense sp. nov.
    Type: Grant
    Filed: October 22, 1981
    Date of Patent: October 4, 1983
    Assignee: American Cyanamid Company
    Inventors: David P. Labeda, John H. E. J. Martin, Joseph J. Goodman
  • Patent number: 4407795
    Abstract: An inclusion compound of p-hexadecylamino benzoic acid sodium salt in .beta.-cyclodextrin which provides enhanced bioavailability of this antiatherosclerotic agent.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: October 4, 1983
    Assignee: American Cyanamid Company
    Inventors: Gabriela Nicolau, Alfred P. Tonelli
  • Patent number: 4387106
    Abstract: Methods of treating atherosclerosis with di(aralkyl) ureas and di(aralkyl)thioureas, compositions thereof and processes for their preparation.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: June 7, 1983
    Assignee: American Cyanamid Company
    Inventors: Vern G. De Vries, Elwood E. Largis
  • Patent number: 4387105
    Abstract: Method of treating atherosclerosis with dialkylureas and dialkylthioureas, compositions thereof and processes for their preparation.
    Type: Grant
    Filed: January 26, 1982
    Date of Patent: June 7, 1983
    Assignee: American Cyanamid Company
    Inventors: Vern G. DeVries, Elwood E. Largis
  • Patent number: 4374987
    Abstract: An improved process for the preparation and purification of N-{p-([2,4-diamino-6-pteridinyl)-methyl]methylamino)benzoyl} glutamic acid, also known as methotrexate, using the alkali metal, calcium and zinc salts of N-methyl-p-aminobenzoylglutamate, tetraaminopyrimidine sulfate, 1,1,3-tribromoacetone and the alkali metal and zinc salts of methotrexate.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: February 22, 1983
    Assignee: American Cyanamid Company
    Inventors: Balwant Singh, Frederic C. Schaefer
  • Patent number: 4350822
    Abstract: Novel para-[aryl(alkyl or alkenyl)amino]benzoic acids, esters, pharmaceutically acceptable salts and pharmaceutical compositions thereof and a method of lowering serum lipid levels in mammals therewith.
    Type: Grant
    Filed: March 15, 1979
    Date of Patent: September 21, 1982
    Assignee: American Cyanamid Company
    Inventors: Jay D. Albright, Thomas G. Miner, Robert G. Shepherd
  • Patent number: 4348399
    Abstract: This disclosure describes novel 4-(monoalkylamino)phenyl alkane, alkene and alkyne carbinols, aldehydes, carboxylic acids and derivatives useful as hypolipidemic and antiatherosclerotic agents.
    Type: Grant
    Filed: February 2, 1978
    Date of Patent: September 7, 1982
    Assignee: American Cyanamid Company
    Inventor: Robert G. Shepherd
  • Patent number: 4311694
    Abstract: A composition of matter in pharmaceutical dosage form comprising an amorphous coprecipitate of water-soluble polyhydroxylic organic compounds and 4-(monoalkylamino)-benzoic acid and derivatives for the treatment of atherosclerosis and hyperlipidemia.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: January 19, 1982
    Assignee: American Cyanamid Company
    Inventors: James E. Krueger, Eugene A. Carpentier
  • Patent number: 4309553
    Abstract: This disclosure describes novel aldehydes and ketones containing a 4-(monoalkylamino)phenyl moiety, derivatives and salts thereof, useful as hypolipidemic and antiatherosclerotic agents.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: January 5, 1982
    Assignee: American Cyanamid Company
    Inventor: Robert G. Shepherd
  • Patent number: 4273785
    Abstract: Novel 4-monoalkylamino-benzaldehydes, 4-mono-alkylamino-alkanophenones, and 4-monoalkylamino-benzophenones, and derivatives and salts thereof, are disclosed which are useful as anti-atherosclerotic agents.
    Type: Grant
    Filed: September 27, 1977
    Date of Patent: June 16, 1981
    Assignee: American Cyanamid Company
    Inventor: Robert G. Shepherd
  • Patent number: 4272546
    Abstract: This disclosure describes esters of 4-(monoalkylamino)benzoic acids with hydroxyalkanoic acids and derivatives, phenols, or 3-pyridinols useful as hypolipidemic and antiatherosclerotic agents.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: June 9, 1981
    Assignee: American Cyanamid Company
    Inventor: Robert G. Shepherd
  • Patent number: 4260816
    Abstract: This disclosure describes pharmaceutical compositions having hypolipidemic and/or hypoglycemic activity which contain a substituted naphthyloxyalkylaminobenzoic acid or salt or ester thereof.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: April 7, 1981
    Assignee: American Cyanamid Company
    Inventors: Jay D. Albright, Thomas G. Miner, Robert G. Shepherd
  • Patent number: 4260815
    Abstract: A process for preparing a solution of DL-mandelic acid is disclosed. The process consists essentially of heating a solution consisting essentially of an optically active 2-amino-1-butanol mandelate and an alkalizing agent, with or without an alcohol solvent; neutralizing the resulting solution with a mineral acid or a mineral acid salt to precipitate an alkali or alkaline earth metal salt; separating the metal salt; and recovering the solution of DL-mandelic acid.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: April 7, 1981
    Assignee: American Cyanamid Company
    Inventors: John Kazan, Chen S. Yu
  • Patent number: 4259521
    Abstract: An improved process is disclosed for resolving DL-mandelic acid using optically active 2-amino-1-butanol. The known process comprises: (a) reacting DL-mandelic acid with optically active 2-amino-1-butanol in an alcohol or alcohol mixture to form an optically active mandelate salt; (b) cooling and recovering the salt; (c) mixing the salt with water and distilling off any residual alcohol; (d) acidifying the mixture with a mineral acid; and (e) cooling and recovering the optically active mandelic acid.The improvement comprises: recycling the mother liquor of step (b) into step (a); heating the mother liquor with an alkalizing agent to obtain a racemic solution; neutralizing the racemic solution to precipitate an alkali or alkaline earth metal salt; separating the metal salt; recycling the mother liquor from the separating step into step (a); and recycling the mother liquor from step (e) into step (c).
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: March 31, 1981
    Assignee: American Cyanamid Company
    Inventors: John Kazan, Chen S. Yu
  • Patent number: 4254138
    Abstract: This disclosure describes esters of 4-(monoalkylamino)benzoic acids with hydroxyalkanoic acids and derivatives, phenols, or 3-pyridinols useful as hypolipidemic and antiatherosclerotic agents.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: March 3, 1981
    Assignee: American Cyanamid Company
    Inventor: Robert G. Shepherd
  • Patent number: 4247693
    Abstract: A process for preparing 2,4,5,6-tetraaminopyrimidine sulfate is disclosed. The process comprises: (1) reacting about one molecular proportion of 5-nitroso-2,4,6-triaminopyrimidine (NTAP) in water with about 2.0 to 2.5 molecular proportions of zinc dust and about 4.0 to 4.7 molecular proportions of a suitable acid, to provide a reaction mixture having a pH below 7; (2) reacting the reaction mixture at a temperature of about 20.degree. to 65.degree. C. to form the acid salt of 2,4,5,6-tetraaminopyrimidine; (3) adjusting the pH to about 2.0 to 2.5 by adding the suitable acid to form a solution of the acid salt; (4) separating the insoluble materials from step (3) to obtain a wet cake and a mother liquor; (5) adding sulfuric acid to the mother liquor to adjust the pH to about 0.2 to 0.5 while maintaining the temperature at about 20.degree. to 60.degree. C.; (6) cooling the reaction mixture of step (5) to about 0.degree. to 10.degree. C.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: January 27, 1981
    Assignee: American Cyanamid Company
    Inventors: Patrick F. O'Brien, John Kazan, John R. Andrade
  • Patent number: 4246903
    Abstract: The surgical instrument comprises a single housing having a barrel and handle. The barrel contains jaws to maintain a hemostatic clip, and a jaw wedge. When actuated by the jaw wedge, the jaws operate in a "scissors action" to compress the hemostatic clip onto the vessel.The barrel portion also contains a feed bar and magazine tape. The magazine tape contains a plurality of hemostatic clips. On retraction, the jaw wedge coordinates with the feed bar and magazine tape to deliver a new clip to the jaws.The jaw wedge is actuated by a trigger pivotally mounted to the handle.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: January 27, 1981
    Assignee: American Cyanamid Company
    Inventor: Joseph F. Larkin
  • Patent number: D265972
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: August 31, 1982
    Assignee: American Cyanamid Company
    Inventor: Seymour Black