Patents by Inventor Norman A. Whittaker

Norman A. Whittaker 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).

  • Pivotal idler frame assembly for conveyers
    Patent number: 5657857
    Abstract: A pivotal idler frame assembly for conveyors is disclosed in one preferred embodiment of the present invention as including an idler frame assembly selectively disposed in a pivotal relationship to a stationary conveyor frame. The idler frame assembly consists of a hinge member rotatably engaging at least two fixation members of the idler frame assembly and at least two support flanges of the conveyor frame which are correspondingly disposed in alignment with the fixation members. By releasing the operable engagement of a stabilizer member, the idler frame assembly may be pivoted in relation to the conveyor frame to remove the rollers of the idler frame from communication with a moving member. In addition, the structural hinge member provides means for slideably removing the idler frame assembly from beneath the moving member and adjacent the conveyor frame to expose the rollers of the idler frame assembly for dismounting and mounting.
    Type: Grant
    Filed: September 11, 1995
    Date of Patent: August 19, 1997
    Inventors: Marvin C. Neilson, Norman A. Whittaker
  • Hydantoin derivatives and pharmaceutical use
    Patent number: 4486443
    Abstract: Hydantoins of formula (I) ##STR1## have biological properties related to those of naturally occurring prostaglandins and may be used in medicine, for example in the treatment of thrombosis.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: December 4, 1984
    Assignee: Burroughs Wellcome Co.
    Inventors: Albert G. Caldwell, Norman Whittaker
  • Hydantoin derivatives, pharmaceutical compounds and methods of use
    Patent number: 4337262
    Abstract: Hydantoins of formula (I) ##STR1## have biological properties related to those of naturally occurring prostaglandins and may be used in medicine, for example in the treatment of thrombosis.
    Type: Grant
    Filed: November 30, 1978
    Date of Patent: June 29, 1982
    Assignee: Burroughs Wellcome Co.
    Inventors: Norman Whittaker, Albert G. Caldwell
  • Nitrogen heterocycles
    Patent number: 4289707
    Abstract: 1,3,6-Trisubstituted piperazine-2,5-diones having biological properties related to those of the natural prostaglandins, their synthesis, compositions containing them, and their use in medicine.
    Type: Grant
    Filed: March 21, 1978
    Date of Patent: September 15, 1981
    Assignee: Burroughs Wellcome Co.
    Inventors: Albert G. Caldwell, Norman Whittaker
  • Nitrogen heterocycles
    Patent number: 4262128
    Abstract: Hydantoins of formula (I) ##STR1## ps have biological properties related to those of naturally occurring prostaglandins and may be used in medicine, for example in the treatment of thrombosis.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: April 14, 1981
    Assignee: Burroughs Wellcome Co.
    Inventors: Albert G. Caldwell, Norman Whittaker
  • Nitrogen heterocycles
    Patent number: 4204068
    Abstract: Hydantoins and N-alkylhydantoins of formula (I) ##STR1## have biological properties related to those of naturally occurring prostaglandins and maybe used in medicine, for example in the treatment of thrombosis.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: May 20, 1980
    Assignee: Burroughs Wellcome Co.
    Inventors: Albert G. Caldwell, Norman Whittaker