Patents by Inventor Alexander B. Penrose

Alexander B. Penrose 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).

  • Phenyl imidazole derivatives
    Patent number: 4489083
    Abstract: A series of bicyclic imidazole and imidazoline derivatives, including their non-toxic acid addition salts, are disclosed. These particular compounds are useful for combatting ectoparasite and helminth infestations in animals, especially sheep and cattle. 2-(2,3-Dimethylphenyl)-2,3,5,6-tetrahydroimidazo[2,1-b]thiazole represents a typical and preferred member compound. Methods for preparing all these compounds from known starting materials are provided.
    Type: Grant
    Filed: November 18, 1982
    Date of Patent: December 18, 1984
    Assignee: Pfizer Inc.
    Inventors: Bernard J. Banks, Alexander B. Penrose
  • Tetrahydro-s-triazine thiones
    Patent number: 4193994
    Abstract: A series of tetrahydro-s-triazin-2-[1H]-thiones and their use as acaricidal agents.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: March 18, 1980
    Assignee: Pfizer Inc.
    Inventors: Michael R. G. Leeming, Subramaniyan Narayanaswami, Alexander B. Penrose
  • Triazapentadienes as acaricides
    Patent number: 4186264
    Abstract: Certain heteroaryl triazapentadienes with acaricidal properties and their preparation are described.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: January 29, 1980
    Assignee: Pfizer Inc.
    Inventors: Alexander B. Penrose, Michael R. G. Leeming
  • Acaricidal agents
    Patent number: 4162253
    Abstract: Quaternary 5,6-dihydroimidazo[2,1-b]thiazolium salts and novel quaternary 6,7-dihydro-[5H]thiazolo[3,2-a]pyrimidinium and 5,6,7,8-tetrahydrothiazolo[3,2-a][1,3]diazepinium salts, their preparation and preferred use as acaricidal agents are disclosed.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: July 24, 1979
    Assignee: Pfizer Inc.
    Inventors: Richard M. Acheson, Ian R. Cox, John K. Stubbs, Alexander B. Penrose
  • Triazapentadienes as acaricides
    Patent number: 4128652
    Abstract: Certain heteroaryl triazapentadienes with acaricidal properties and their preparation are described.
    Type: Grant
    Filed: April 13, 1977
    Date of Patent: December 5, 1978
    Assignee: Pfizer Inc.
    Inventors: Alexander B. Penrose, Michael R. G. Leeming
  • Quaternary 6,7-dihydro-[5H]-thiazolo[3,2-a]pyrimidinium salts
    Patent number: 4122272
    Abstract: Quaternary 5,6-dihydroimidazo[2,1-b]thiazolium salts and novel quaternary 6,7-dihydro-[5H]thiazolo[3,2-a]pyrimidinium and 5,6,7,8-tetrahydrothiazolo[3,2-a][1,3]diazepinium salts, their preparation and preferred use as acaricidal agents are disclosed.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: October 24, 1978
    Assignee: Pfizer Inc.
    Inventors: Richard M. Acheson, Ian R. Cox, John K. Stubbs, Alexander B. Penrose
  • Certain thiazolo compounds as acaricidal agents
    Patent number: 4076817
    Abstract: Quaternary 5,6-dihydroimidazo[2,1-b]thiazolium salts and novel quaternary 6,7-dihydro-[5H]thiazolo[3,2-a]pyrimidinium and 5,6,7,8-tetrahydrothiazolo[3,2-a][1,3]diazepinium salts, their preparation and preferred use as acaricidal agents are disclosed.
    Type: Grant
    Filed: November 2, 1976
    Date of Patent: February 28, 1978
    Assignee: Pfizer Inc.
    Inventors: Richard M. Acheson, Ian R. Cox, John K. Stubbs, Alexander B. Penrose