Patents by Inventor Gerardo Chapa

Gerardo Chapa 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).

  • Methods and compositions for preparing rigid foams with non-chlorofluorocarbon blowing agents
    Patent number: 5496869
    Abstract: Disclosed are methods and compositions for preparing rigid foams by contacting a polyisocyanate with a polyol mixture comprising(a) from about 40-95% by weight of a polyester or polyether polyol;(b) a catalytic amount of a catalyst system comprising a primary catalyst and an amino acid salt catalyst derived from sarcosine; and(c) a non-chlorofluorocarbon blowing agent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 5, 1996
    Assignee: Stepan Company
    Inventors: Steve Williams, Warren Kaplan, Paul Neill, Gerardo Chapa
  • Methods and compositions for preparing rigid foams with non-chlorofluorocarbon blowing agents
    Patent number: 5464561
    Abstract: Disclosed are methods and compositions for preparing rigid foams by contacting a polyisocyanate with a polyol mixture comprising(a) from about 40-95% by weight of a polyester or polyether polyol;(b) a catalytic amount of a catalyst system comprising a primary catalyst and an amino acid salt catalyst derived from sarcosine; and(c) a non-chlorofluorocarbon blowing agent.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: November 7, 1995
    Assignee: Stepan Company
    Inventors: Steve Williams, Warren Kaplan, Paul Neill, Gerardo Chapa
  • Methods and compositions for preparing rigid forms with non-chlorofluorocarbon blowing agents
    Patent number: 5407967
    Abstract: Disclosed are methods and compositions for preparing rigid foams by contacting a polyisocyanate with a polyol mixture comprising(a) from about 40-95% by weight of a polyester or polyether polyol;(b) a catalytic amount of a catalyst system comprising a primary catalyst and an amino acid salt catalyst derived from sarcosine; and(c) a non-chlorofluorocarbon blowing agent.
    Type: Grant
    Filed: May 5, 1994
    Date of Patent: April 18, 1995
    Assignee: Stepan Company
    Inventors: Steve Williams, Warren Kaplan, Paul Neill, Gerardo Chapa