Patents by Inventor Leonard H. Palys

Leonard H. Palys 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).

  • Unsaturated peroxide compositions, polymeric-peroxides derived therefrom and their uses
    Patent number: 5494988
    Abstract: Novel unsaturated peroxide compositions of Structure A,R--Q--X--R.sub.1 A[Where the R--Q-- grouping contains a polymerizable carbon-carbon double bond, --X-- is a direct bond or a connecting diradical and --R.sub.1 is a peroxide containing radical all as defined in the Summary of the Invention Section.], polymeric-peroxide compositions derived from them and their uses are disclosed.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: February 27, 1996
    Assignee: Elf Atochem North America, Inc.
    Inventors: Jose Sanchez, Leonard H. Palys, Daryl L. Stein, John S. Yormick
  • Unsaturated peroxide compositions, polymeric-peroxides derived therefrom and their uses
    Patent number: 5489699
    Abstract: Novel unsaturated peroxide compositions of Structure A,R--Q--X--R.sub.1 A[Where the R--Q-- grouping contains a polymerizable carbon-carbon double bond, --X-- is a direct bond or a connecting diradical and --R.sub.1 is a peroxide containing radical all as defined in the Summary of the Invention Section.], polymeric-peroxide compositions derived from them and their uses are disclosed.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: February 6, 1996
    Assignee: Elfatochem North America, Inc.
    Inventors: Jose Sanchez, Leonard H. Palys, Daryl L. Stein, John S. Yormick
  • Unsaturated peroxide compositions, polymeric-peroxides derived therefrom and their uses
    Patent number: 5475072
    Abstract: Novel unsaturated peroxide compositions of Structure A,R--Q--X--R.sub.1 Apolymeric-peroxide compositions derived from them and their uses are disclosed.
    Type: Grant
    Filed: February 9, 1994
    Date of Patent: December 12, 1995
    Assignee: Elf Atochem North America, Inc.
    Inventors: Jose Sanchez, Leonard H. Palys, Daryl L. Stein, John S. Yormick
  • Process for reducing residual monomers in low viscosity polymer-polyols
    Patent number: 4804775
    Abstract: An improved process is provided for preparing stable low viscosity polymer-polyols containing less than about 100 ppm residual monomers by using a monoperoxycarbonate initiator in combination with at least one initiator selected from diperoxyketals and peroxyesters, as chaser catalysts, at or near the end of the polymerization. The polymer-polyols prepared by the instant invention can be used to prepare high resiliency (load bearing) polyurethane foams.
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: February 14, 1989
    Assignee: Pennwalt Corporation
    Inventors: Vasanth R. Kamath, Leonard H. Palys