Patents by Inventor Gary L. Kiser

Gary L. Kiser 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).

  • Copolyether glycol manufacturing process
    Patent number: 8609805
    Abstract: The present invention provides a highly efficient process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol, said process exhibiting an Space Time Yield value of greater than about 0.9.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: December 17, 2013
    Assignee: Invista North America S.A R.L.
    Inventors: Qun Sun, Gary L. Kiser, Robert D. Orlandi
  • COPOLYETHER GLYCOL MANUFACTURING PROCESS
    Publication number: 20120259090
    Abstract: The present invention provides a highly efficient process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol, said process exhibiting an Space Time Yield value of greater than about 0.9.
    Type: Application
    Filed: September 28, 2011
    Publication date: October 11, 2012
    Applicant: INVISTA North America S.a r.l.
    Inventors: Qun SUN, Gary L. KISER, Robert D. ORLANDI
  • COPOLYETHER GLYCOL MANUFACTURING PROCESS
    Publication number: 20100267905
    Abstract: The present invention provides a process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol.
    Type: Application
    Filed: April 15, 2009
    Publication date: October 21, 2010
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventors: Qun Sun, Gary L. Kiser, Robert D. Orlandi
  • Formaldehyde manufacturing process
    Patent number: 4076754
    Abstract: In a process for the manufacture of formaldehyde by the silver-catalyzed oxidation of methanol in two stages, a composite catalyst is used in the second oxidation stage, which is prepared by sintering an upstream layer of foraminous silver having a void volume of 75 to 90% contiguous to a downstream layer of crystalline silver particles having a void volume of 65 to 75% which is at least about 5% below the void volume of the upper layer.
    Type: Grant
    Filed: January 20, 1976
    Date of Patent: February 28, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gary L. Kiser, Bobby G. Hendricks