Patents by Inventor David R. Mann

David R. Mann 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: 4304851
    Abstract: Light-sensitive photographic films are produced by coating polyester films with aqueous dispersions of polyesters or copolyesters containing free-functional acid groups. Corona discharge treatment of the polyester or copolyester layers is disclosed for direct adhesion to photographic emulsions or indirect adhesion via a polymeric sub and/or gelatin sub.
    Type: Grant
    Filed: October 1, 1980
    Date of Patent: December 8, 1981
    Assignee: Bexford Limited
    Inventors: Patrick T. McGrail, David R. Mann
  • Patent number: 4252885
    Abstract: Light-sensitive photographic films are produced by coating polyester films with aqueous dispersions of polyesters or copolyesters containing free-functional acid groups. Corona discharge treatment of the polyester or copolyester layers is disclosed for direct adhesion to photographic emulsions or indirect adhesion via a polymeric sub and/or gelatin sub.
    Type: Grant
    Filed: March 22, 1978
    Date of Patent: February 24, 1981
    Assignee: Bexford Limited
    Inventors: Patrick T. McGrail, David R. Mann
  • Patent number: 4135932
    Abstract: Photographic film bases and sensitized photographic films are produced by coating a supporting film with an aqueous dispersion or a solution in an organic solvent of an essentially water-insoluble homopolymer and/or copolymer of styrene and/or a styrene derivative to form an adherent polymeric subbing layer which is then subjected to a surface modifying, e.g. corona discharge, treatment. Light-sensitive photographic emulsions adhere directly to the treated subbing layer without the need for an intermediate gelatin subbing layer.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: January 23, 1979
    Assignee: Bexford Limited
    Inventor: David R. Mann
  • Patent number: 4120380
    Abstract: An oiler for a motorcycle chain has a container for an oil can the discharge therefrom controlled by a plunger exposed at one end. The container has a port and includes an open-ended chamber which the can fits and a cap provided with a lever yieldably held in a first inoperative position and moved into a second position by means operated by the operator and in the second position the plunger is actuated to effect oil discharge through a conduit extending through the container port. The container is attachable to the frame of the motorcycle in a position such that discharged oil is delivered to a course of the chain.
    Type: Grant
    Filed: June 20, 1977
    Date of Patent: October 17, 1978
    Inventor: David R. Mann
  • Patent number: T995007
    Abstract: Photographic film bases and sensitized photographic films are produced by coating a supporting film, especially a linear polyester film such as a biaxially oriented and heat-set film of polyethylene terephthalate, with a subbing composition comprising a polymer of a vinyl halogenoester, such as vinyl mono-, di-, or trichloroacetate, which is then subjected to a surface modifying, e.g. corona discharge, treatment. Light-sensitive photographic emulsions adhere directly to the treated subbing layer without the need for an intermediate gelatin subbing layer. The vinyl halogenoester subbing polymer may be a copolymer formed with a softening temperature-lowering comonomer such as an alkyl acrylate, alkyl methacrylate, polyalkylene oxide itaconate or maleate, vinyl alkyl ether, vinyl ester, alkene, alkadiene or alkyl styrene, a suitable copolymer being 78/15/7 mole % vinyl monochloroacetate/ethyl acrylate/acrylamide.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: June 3, 1980
    Assignee: Bexford Limited
    Inventor: David R. Mann