Patents by Inventor Royce E. Ennis

Royce E. Ennis 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: 8013072
    Abstract: At least partially hydrolyzed chlorosulfonated polyolefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from low density polyethylene or from linear ethylene/alpha-olefin copolymer base resins having a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) less than 3.5.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: September 6, 2011
    Assignee: DuPont Performance Elastomers L.L.C.
    Inventor: Royce E. Ennis
  • Publication number: 20100292405
    Abstract: At least partially hydrolyzed chlorosulfonated polyolefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from low density polyethylene or from linear ethylene/alpha-olefin copolymer base resins having a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) less than 3.5.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 18, 2010
    Applicant: DuPont Performance Elastomers L.L.C.
    Inventor: Royce E. Ennis
  • Publication number: 20100292395
    Abstract: A process for the manufacture of an oil concentrate comprising oil and one or more at least partially hydrolyzed chlorosulfonated polyolefin elastomers containing 0.5-50 weight percent chlorine and 0.25 to 5 weight percent sulfur is disclosed.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 18, 2010
    Applicant: DuPont Performance Elastomers L.L.C.
    Inventor: Royce E. Ennis
  • Publication number: 20090247719
    Abstract: Chlorosulfonated polyolefin elastomers containing 1-10 weight percent chlorine and 0.5 to 5 weight percent sulfur and having with a Cl:S weight ratio of 10 or less are prepared in a batch solution process employing a chlorosulfonation agent of sulfuryl chloride or the combination of Cl2 and SO2.
    Type: Application
    Filed: March 11, 2009
    Publication date: October 1, 2009
    Inventor: Royce E. Ennis
  • Patent number: 5234989
    Abstract: Self-stabilized resin latexes are provided which contain carboxylate salts of post-chlorinated ethylene copolymers having chlorine contents of 20-60 weight percent. The ethylene copolymer salts are derived from ethylene/acrylic acid or ethylene/methacrylic acid copolymers containing 1.5-12 mole percent copolymerized units of acrylic or methacrylic acid. The latexes are particularly useful for preparing resorcinol formaldehyde adhesives.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: August 10, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John C. Chen, Royce E. Ennis
  • Patent number: 5102946
    Abstract: A stabilized chlorinated resin latex comprising a mixture in water of A) 50-95 wt. %, based on the weight of A and B, of a chlorinated resin, substantially free of acid moieties, having a chlorine content of 15-70 wt. %, and B) 5-50 wt. %, based on the weight of A and B, of a salt of a water-insoluble C.sub.2 -C.sub.12 alpha, beta- unsaturated olefin copolymer which contains at least 2 mole % acid moieties and is compatible with the chlorinated resin.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: April 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John C. Chen, Royce E. Ennis
  • Patent number: 4824906
    Abstract: A blend of 80-99 weight percent chlorinated polyethylene containing 15-60 weight percent chlorine with 20-1 weight percent of polyethylene containing up to 5 weight percent chlorine and 0.5-5 weight percent of a grafted unsaturated dicarboxylic acid or anhydride is disclosed. The preferred chlorinated polyethylene is made by chlorinating a blend of high and low density polyethylene.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: April 25, 1989
    Assignee: E. I. DuPont De Nemours and Company
    Inventors: Wolfgang Honsberg, Royce E. Ennis
  • Patent number: 4749751
    Abstract: A process is disclosed for producing a blend of chlorinated low density polyethylene and chlorinated high density polyethylene wherein the polyethylenes are placed in a solvent and the temperature raised to a point where the low density polyethylene goes into solution and the high density polyethylene does not go into solution. The low density polyethylene is chlorinated up to the desired level and then the temperature is raised to dissolve the high density polyethylene and chlorination of both polyethylenes is continued to the desired level.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: June 7, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Royce E. Ennis, Wolfgang Honsberg
  • Patent number: 4591621
    Abstract: An uncured chlorinated polyethylene elastomer having a molecular weight distribution of about 6-13, as determined by the ratio of Mw/Mn where Mw represents the weight average molecular weight and Mn represents the number average molecular weight, a chlorine content of about 20-28% by weight, a Mooney viscosity value, determined according to ASTM D 1646-81, ML.sub.(1+4) at 100.degree. C., of about 15-36; and, optionally, a sulfur content of about 0.2-2% by weight and a process for their preparation.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: May 27, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Royce E. Ennis
  • Patent number: H1582
    Abstract: Non-discolored chlorinated and chlorosulfonated olefin polymers having low levels of residual solvent are prepared in a process wherein monofluorobenzene is used as a reaction medium and isolation of the polymer is by means of a series of vented closed loop extruders. The process also results in suppression of the formation of monochloromonofluorobenzene as a by-product.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: August 6, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Christopher J. Bish, Edward G. Brugel, Royce E. Ennis, Jerry W. Soape