Patents by Inventor Robert M. Partin

Robert M. Partin 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).

  • Polyisocyanate compositions containing in-situ formed pyrophosphate mold release agent and process of making
    Patent number: 4258169
    Abstract: A process is disclosed for the preparation of liquid, storage-stable, polyisocyanate compositions containing a release agent formed in situ which compositions are useful, for example, as binder resins in the formation of particle boards which latter, because of the presence of the release agent, show no tendency to adhere to the face of metal platens used in their formation. The process comprises heating an organic polyisocyanate (polymethylene polyphenyl polyisocyanate preferred) with an acid phosphate (e.g. a mixture of mono- and di-alkyl acid phosphates) under conditions controlled as to time and temperature so as to yield a product which is storage stable and shows no tendency to deposit solid or to separate into two liquid phases.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: March 24, 1981
    Assignee: The Upjohn Company
    Inventors: Richard A. Prather, David L. Williams, Robert M. Partin, Warren J. Rabourn
  • Process of making particle board from pyrophosphate treated polyisocyanates
    Patent number: RE31703
    Abstract: A process is disclosed for the preparation of liquid, storage-stable, polyisocyanate compositions containing a release agent formed in situ which compositions are useful, for example, as binder resins in the formation of particle boards which latter, because of the presence of the release agent, show no tendency to adhere to the face of metal platens used in their formation. The process comprises heating an organic polyisocyanate (polymethylene polyphenyl polyisocyanate preferred) with an acid phosphate (e.g. a mixture of mono- and di-alkyl acid phosphates) under conditions controlled as to time and temperature so as to yield a product which is storage stable and shows no tendency to deposit solid or to separate into two liquid phases.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: October 9, 1984
    Assignee: The Upjohn Company
    Inventors: Richard A. Prather, David L. Williams, Robert M. Partin, Warren J. Rabourn, deceased