Patents by Inventor John Penfold

John Penfold 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).

  • Patent number: 6048935
    Abstract: Curable, silane-grafted substantially linear ethylene polymers are described which are useful as wire and cable coatings, weatherstripping, fibers and the like. These silane-grafted polymers can be either filled or unfilled and cure quickly relative to many commercial coatings.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: April 11, 2000
    Assignee: The Dow Chemical Company
    Inventors: John Penfold, Morgan M. Hughes, Stephen Henry Cree, Jeffery E. Brann
  • Patent number: 5852116
    Abstract: Crosslinkable polyolefin compositions, articles prepared from such compositions, and processes for making such compositions are described that possess both good processability and fast cure rates. The crosslinkable polyolefin compositions are bidisperse blends of ethylene polymers of the same polymer family having differing number average molecular weights as obtained by deconvolution in which M.sub.n1 /M.sub.n2 >7, M.sub.n2 >3000 and 0.7.gtoreq.(A.sub.1 /(A.sub.1 +A.sub.2)).gtoreq.0.15 wherein M.sub.n1 represents the number average molecular weight of the first deconvoluted component, M.sub.n2 represents the number average molecular weight of the second deconvoluted component, and A.sub.1 and A.sub.2 are the relative proportions of the first and second components.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: December 22, 1998
    Assignee: The Dow Chemical Company
    Inventors: Stephen H. Cree, John Penfold, Line F. Fanichet, Craig A. Wilson
  • Patent number: 5824718
    Abstract: Curable, silane-grafted substantially linear ethylene polymers are described which are useful as wire and cable coatings, weatherstripping, fibers and the like. These silane-grafted polymers can be either filled or unfilled and cure quickly relative to many commercial coatings.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: October 20, 1998
    Assignee: The Dow Chemical Company
    Inventors: John Penfold, Morgan M. Hughes, Stephen Henry Cree, Jeffery E. Brann
  • Patent number: 5741858
    Abstract: Molded articles of silane-crosslinked blends comprising a polyolefin elastomer and a crystalline polyolefin polymer exhibit desirable tensile strength and/or compression set properties, and are prepared by (i) blending a low density polyolefin elastomer with a crystalline polyolefin polymer, (ii) grafting the blend with a silane crosslinker, (iii) shaping the silane-grafted blend into the molded article, and (iv) curing the shaped, silane-grafted blend with water, preferably in the presence of a cure catalyst.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: April 21, 1998
    Assignee: The Dow Chemical Company
    Inventors: Jeffery E. Brann, Morgan M. Hughes, Stephen H. Cree, John Penfold
  • Patent number: 4980445
    Abstract: The present invention concerns a thermoplastic polyurethane material which is the reaction product of (1) a mixture of (a) 0.86 to 0.98 mole equivalent of a polyester diol having the molecular weight of from 650 to 5,000 and (b) 0.02 to 0.14 mole equivalent of a polyether diol having the molecular weight of from 2,000 to 5,000, and (2) a difunctional chain extender with (3) an organic diisocyanate. These polyurethane materials exhibit high resistance to severe abrasion forces while retaining desirable mechanical properties and are useful for the manufacture of shoe soles, ski boots, ski bindings, conveyor belts and screens used by mining industry and the like.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: December 25, 1990
    Assignee: The Dow Chemical Company
    Inventors: Hanno R. van Der wal, Henry W. Bonk, John Penfold
  • Patent number: 4480070
    Abstract: Isocyanate compositions are disclosed which yield aqueous emulsions on admixture with water. The emulsions are sufficiently stable to permit employment as particle board binders and like uses. The compositions of the invention are derived by reaction of a polymethylene polyphenyl polyisocyanate with a particular group of polyethylene glycols which have been capped with a block of propylene oxide residues.
    Type: Grant
    Filed: June 27, 1983
    Date of Patent: October 30, 1984
    Assignee: The Upjohn Company
    Inventors: Filippus Bosscher, John Penfold, Klaus W. Reich, Albertus Zandvoort