Patents by Inventor Paul W. Foerst

Paul W. Foerst 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).

  • Perfluorinated polyethers and process for their preparation
    Patent number: 5120459
    Abstract: Perfluorinated polyethers having the formulaR.sub.f O--(CF.sub.2 CF.sub.2 O).sub.n --R'.sub.fwherein n is an integer of 1-11 and each of R.sub.f and R'.sub.f is a perfluorinated C.sub.1 -C.sub.5 -alkyl radical, dimers of such polyethers and carbon to carbon intramolecularly coupled cyclic derivatives of such polyethers are produced by direct fluorination of the polyethers in an inert solvent. Compositions of the perfluorinated polyethers and their derivatives are useful as functional fluids.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: June 9, 1992
    Assignee: Monsanto Company
    Inventors: Dennis J. Kalota, John S. McConaghy, Jr., Paul W. Foerst, Paul H. Liu, Frank R. Feher, Jr.
  • Novel perfluorinated polyethers and process for their preparation
    Patent number: 5076949
    Abstract: Perfluorinated polyethers having the formulaR.sub.f O--(CF.sub.2 CF.sub.2 O).sub.n --R'.sub.fwherein n is an integer of 1-11 and each of R.sub.f and R'.sub.f is a perfluorinated C.sub.1 -C.sub.5 -alkyl radical, dimers of such polyethers and carbon to carbon intramolecularly coupled cyclic derivatives of such polyethers are produced by direct fluorination of the polyethers in an inert solvent. Compositions of the perfluorinated polyethers and their derivatives are useful as functional fluids.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: December 31, 1991
    Assignee: Monsanto Company
    Inventors: Dennis J. Kalota, John S. McConaghy, Jr., Paul W. Foerst, Paul H. Liu, Frank R. Feher, Jr.
  • Novel perfluorinated polyethers and process for their preparation
    Patent number: 4996369
    Abstract: Perfluorinated polyethers having the formulaR.sub.f O--(CF.sub.2 CF.sub.2 O).sub.n --R'.sub.fwherein n is and integer of 1-11 and each of R.sub.f and R'.sub.f is a perfluorinated C.sub.1 -C.sub.5 -alkyl radical, dimers of such polyethers and carbon to carbon intramolecularly coupled cyclic derivatives of such polyethers are produced by direct fluorination of the polyethers in an inert solvent. Compositions of the perfluorinated polyethers and their derivatives are useful as functional fluids.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: February 26, 1991
    Assignee: Monsanto Company
    Inventors: Dennis J. Kalota, John S. McConaghy, Jr., Paul W. Foerst, Paul H. Liu, Frank R. Feher, Jr.
  • Bitumen filled polyester foams
    Patent number: 4086195
    Abstract: Bitumen filled polyester foams are provided through a process which comprises forming a solution of a bitumen having a softening point of at least about 80.degree. C. and a cyclic diacid anhydride at a temperature above the softening point of a bitumen, the bitumen solution is then mixed with a monoterminal epoxide and a polyterminal epoxide in the presence of a blowing agent resulting in the initiation of an exothermic reaction. The process for producing bitumen filled polyester foams through the in situ polymerization of polyesters in a solution of bitumen and the foams produced by the process constitute the invention.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: April 25, 1978
    Assignee: Monsanto Company
    Inventors: Walter R. Knox, James C. Hill, Lawrence J. Hughes, Paul W. Foerst