Patents by Inventor Howard W. Swofford

Howard W. Swofford 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: 5082738
    Abstract: Oriented polyester films primer coated with a hydrolyzed amino silane are disclosed. These silanes in the unhydrolyzed state have the formula:XSi(R.sup.2).sub.a (R.sup.3).sub.bwherein X is a radical selected from the group consisting of H.sub.2 NR.sup.1 HNR.sup.1 --and H.sub.2 NR.sup.1 HNR.sup.1 HNR.sup.1 --; the R.sup.1 's are the same or different group selected from the group consisting of C.sub.1 to C.sub.8 alkyl or phenyl; R.sup.2 is a hydrolyzeable group selected from the group consisting of C.sub.1 to C.sub.8 alkoxy, an acetoxy group or a halide; R.sup.3 is a nonreactive, nonhydrolyzeable group selected from the group consisting of C.sub.1 to C.sub.3 alkyl or phenyl; (a) is an integer ranging from 1 to 3; (b) is an integer ranging from 0 to 2, with the sum of (a) and (b) being 3.The hydrolyzed aminosilane is applied to the film as an aqueous solution at any suitable stage during manufacture of the film, i.e., before or during the stretching operation, or it may also be applied to the finished film.
    Type: Grant
    Filed: November 29, 1989
    Date of Patent: January 21, 1992
    Assignee: Hoechst Celanese Corporation
    Inventor: Howard W. Swofford
  • Patent number: 5064722
    Abstract: Oriented polyester films primer coated in-line with a hydrolyzed aminosilane are disclosed. These silanes in the unhydrolyzed state have the formula:XSi(R.sup.2).sub.a (R.sup.3).sub.bwherein X is a radical selected from the group consisting of H.sub.2 NR.sup.1 HNR.sup.1 --H.sub.2 NR.sup.1 HNR.sup.1 HNR.sup.1 --; the R.sup.1 's are the same or different groups selected from the group consisting of C.sub.1 to C.sub.8 alkyl or phenyl; R.sup.2 is a hydrolyzable group selected from the group consisting of C.sub.1 to C.sub.8 alkoxy, an acetoxy group or a halide; R.sup.3 is a nonreactive, nonhydrolyzable group selected from the group consisting of C.sub.1 to C.sub.3 alkyl or phenyl; (a) is an integer ranging from 1 to 3; (b) is an integer ranging from 0 to 2, with the sum of (a) and (b) being 3.The hydrolyzed aminosilane is applied to the film in-line as an aqueous solution at any suitable stage during manufacture of the film, i.e.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: November 12, 1991
    Assignee: Hoechst Celanese Corporation
    Inventors: Howard W. Swofford, Stephen J. Gust
  • Patent number: 5022944
    Abstract: Oriented polyester film primer coated-in-line with hydrolyzed aminosilane is disclosed. The aminosilanes in the unhydrolyzed state have the formula:(R.sup.1).sub.a Si(R.sup.2).sub.b (R.sup.3).sub.cwherein R.sup.1 is a functional group with at least one primary amino group; R.sup.2 is a hydrolyzeable group such as a lower alkoxy group, an acetoxy group, or a halide; and R.sup.3 is a nonreactive, nonhydrolyzeable group such as a lower alkyl or a phenyl group; with (a) being greater than or equal to 1; (b) being greater than or equal to 1; (c) being greater than or equal to zero; and with a+b+c=4. The hydrolyzed aminosilane is applied to the film as an aqueous solution at any suitable stage during manufacture of the film, i.e, before, or during, or after the stretching operation, but prior to heat setting the film. The resultant primed polyester film is found to exhibit excellent adhesion to other polymeric materials.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: June 11, 1991
    Assignee: Hoechst Celanese Corporation
    Inventors: Howard W. Swofford, Sandra W. Rice, Grover L. Farrar, David Rudd
  • Patent number: 4954396
    Abstract: Oriented polyester film primer coated in-line with a hydrolyzed aminosilane is discovered. The aminosilanes in the unhydrolyzed state have the formula:(R.sup.1).sub.a Si(R.sup.2).sub.b (R.sup.3).sub.cwherein R.sup.1 is a functional group with at least one primary amino group; R.sup.2 is a hydrolyzeable group such as a lower alkoxy group, an acetoxy group, or a halide; and R.sup.3 is a nonreactive, nonhydrolyzeable group such as a lower alkyl or a phenyl group; with (a) being greater than or equal to 1; (b) being greater than or equal to 1; (c) being greater than or equal to zero; and with a+b+c=4. The hydrolyzed aminosilane is applied to the film as an aqueous solution at any suitable stage during manufacture of the film, i.e., before, or during, or after the stretching operation, but prior to heat setting the film. The resultant primed polyester film is found to exhibit excellent adhesion to other polymeric materials.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: September 4, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Howard W. Swofford, Sandra W. Rice, Grover L. Farrar, David Rudd
  • Patent number: 4939035
    Abstract: Oriented polyester film primer coated with a hydrolyzed aminosilane IS disclosed. The aminosilanes in the unhydrolyzed state have the formula:(R.sup.1).sub.a Si(R.sup.2).sub.b (R.sup.3).sub.cwherein R.sup.1 is a functional group with at least one primary amino group; R.sup.2 is a hydrolyzeable group such as a lower alkoxy group, an acetoxy group, or a halide; and R.sup.3 is a nonreactive, nonhydrolyzeable group such as a lower alkyl or a phenyl group; with (a) being greater than or equal to 1; (b) being greater than or equal to 1; (c) being greater than or equal to zero; and with a+b+c=4. The preferred silane is N-beta-(aminoethyl)-gamma-aminopropyltrimethoxysilane having the formula:H.sub.2 N(CH.sub.2).sub.2 NH(CH.sub.2).sub.3 Si(OCH.sub.3).sub.3.The hydrolyzed aminosilane is applied to the film as an aqueous solution at any suitable stage during manufacture of the film, i.e., before or during the stretching operation, or it may also be applied to the finished film.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: July 3, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Howard W. Swofford
  • Patent number: 4898786
    Abstract: Oriented polyester films primer coated with a hydrolyzed amino silane are disclosed. These silanes in the unhydrolyzed state have the formula:XSi(R.sup.2).sub.a (R.sup.3).sub.bwherein X is a radical selected from the group consisting of H.sub.2 NR.sup.1 HNR.sup.1 -- and H.sub.2 NR.sup.1 HNR.sup.1 HNR.sup.1 --; the R.sup.1 's are the same or different groups selected from the group consisting of C.sub.1 and C.sub.8 alkyl or phenyl; R.sup.2 is a hydrolyzable group selected from the group consisting of C.sub.1 to C.sub.8 alkoxy, an acetoxy group or a halide; R.sup.3 is a nonreactive, nonhydrolyzable group selected from the group consisting of C.sub.1 to C.sub.3 alkyl or phenyl; (a) is an integer ranging from 1 to 3; (b) is an integer ranging from 0 to 2, with the sum of (a) and (b) being 3.The hydrolyzed aminosilane is applied to the film as an aqueous solution at any suitable stage during manufacture of the film, i.e., before or during the stretching operation, or it may also be applied to the finished film.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: February 6, 1990
    Assignee: Hoechst Celanese Coproration
    Inventor: Howard W. Swofford
  • Patent number: 4822828
    Abstract: A aqueous, radiation curable, coating composition is disclosed which comprises: (A) from 50 to 85 percent, based on the total weight of the dispersion, of a vinyl functional silane, (B) from 15 to 50 percent, based on the total weight of the dispersion of a multifunctional acrylate, and (C) optionally, from 1 to 3 weight percent of a photoinitiator. The vinyl-functional silane is the partial condensate of silica and a silane, such that at least sixty percent of the silane is a vinyl-functional silane conforming to the formula(R).sub.a Si(R').sub.b (R").sub.cwhereinR is allyl or vinyl functional alkylR' is hydrolyzable alkoxy or methoxyR" is non-hydrolyzable, saturated alkyl, phenyl, or siloxy,such that a+b+c=4; anda.gtoreq.1;b.gtoreq.1;c.gtoreq.0.The above described coating composition may be applied to plastic materials and cured by exposure to ultraviolet or electron beam irradiation to form a substantially clear, abrasion resistant layer.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: April 18, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: Howard W. Swofford