Patents by Inventor Robert L. Dawson

Robert L. Dawson 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: 5206294
    Abstract: Thermoplastic polymer alloy compositions are provided consisting of a blend of polypropylene, ethylene copolymer ionomer resin, ethylene/glycidyl acrylate or methacrylate copolymer, and uncrosslinked ethylene propylene rubber. The compositions are particularly useful in applications where a wide range of temperature and abrasive conditions are encountered.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: April 27, 1993
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert L. Dawson
  • Patent number: 4477633
    Abstract: A chlorinated polyethylene elastomer is made by mixing polyethylene with water to form an aqueous suspension of the polyethylene and simultaneously chlorinating and grafting a cure site on the polyethylene by mixing and heating the aqueous suspension containing a free radical initiator, gaseous chlorine and about 0.1-1.5 moles per kg of polyethylene of an alkyl or alkylaryl monester of butenedioic acid having the formulas ##STR1## or mixtures thereof, where R.sub.1 is an alkyl or alkylaryl group having from about 8-20 carbon atoms and R.sub.2 and R.sub.3 are hydrogen, chlorine or an alkyl group having from about 1-4 carbon atoms.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: October 16, 1984
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: Robert L. Dawson
  • Patent number: 4117936
    Abstract: A self-clamping wire rack is provided for magazines, cards, napkins, letters, and the like; the rack being formed in its basic configuration of a first wire rod which is bent to constitute the rear side of the rack and also to constitute a pair of rearwardly extending legs; and of a second wire rod bent to constitute the front side of the rack and also constitute a pair of forwardly extending legs; the two components of the rack being hinged to one another in a manner such that when the assembly is placed on a horizontal surface, the front and rear sides are turned angularly towards one another to exert a clamping force on the magazines, cards, or other articles supported on the rack between the front and rear sides of the rack, so as to maintain such articles in the rack.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: October 3, 1978
    Assignee: Prima International
    Inventor: Robert L. Dawson