Patents by Inventor R. David Peveler

R. David Peveler 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).

  • Polycyclic fluorophosphites useful as stabilizers
    Patent number: 5688847
    Abstract: Disclosed is a fluorophosphite compound of the formula ##STR1## This compound shows superior performance as a stabilizer in polymers, such as polypropylene, and polyvinyl chloride. Also disclosed is a process for making this compound.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: November 18, 1997
    Assignee: Witco Corporation
    Inventors: Michael E. Gelbin, Michael H. Fisch, R. David Peveler
  • Process for making aryl fluorophosphites useful as stabilizers
    Patent number: 5659060
    Abstract: Disclosed is a process for making compounds of the formula ##STR1## by reacting phosphorus trihalide with the corresponding phenol and fluorinating the resulting halophosphite intermediate, in the presence of a catalyst which comprises dimethylformamide.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: August 19, 1997
    Assignee: Witco Corporation
    Inventors: Michael E. Gelbin, Michael H. Fisch, R. David Peveler
  • Cellulose ester resin stabilizer and cellulose ester resin compositions stabilized therewith
    Patent number: 5225467
    Abstract: Nonylphenyl neopentylene phosphite, or stated in terms of systematic nomenclature 5,5-dimethyl-2-nonylphenoxy-1,3,2-dioxaphosphorinane, compositions effective to stabilize cellulose ester resins against the degradative effects of heat and processing are disclosed. In accordance with the present invention, preferred stabilizing compositions for cellulose ester resins include nonylphenyl neopentylene phosphite in combination with epoxidized linseed oil. These stabilizing compositions demonstrate their stabilizing effectiveness by maintaining the melt viscosity of the polymer during hot working and minimizing discoloration of the polymer when heated.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: July 6, 1993
    Assignee: Witco Corporation
    Inventors: Surinder Ahluwalia, Michael H. Fisch, R. David Peveler