Patents by Inventor William E. Carroll

William E. Carroll 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).

  • Functional oligomeric vinylformamides and vinylamines
    Patent number: 5373076
    Abstract: Vinylamide oligomers having molecular weights between about 280 and 7,500 are prepared by the cationic polymerization of vinylamides in the presence of a Lewis acid at a temperature between -100.degree. and 100.degree. C. The resultant vinylamide oligomers are characterized in that they have a proton initiating group at one end and an aldehyde equivalent at the other end. These vinylamide oligomers can optionally be hydrolyzed under acidic or basic conditions to form the corresponding vinylamine oligomers.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: December 13, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert K. Pinschmide, Jr., William E. Carroll
  • Crosslinked vinyl alcohol/vinylamine copolymers for dry end paper addition
    Patent number: 5281307
    Abstract: An improved papermaking process has been developed to enhance the properties of the resultant paper or paper-type products. The process involves adding a polyvinyl alcohol/vinylamine copolymer along with a crosslinking agent at the dry end step of a conventional papermaking process. Improvements in the properties of the resultant paper products are observed, especially at low levels of copolymer addition.
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: January 25, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John G. Smigo, Lloyd M. Robeson, George Davidowich, Gerald D. Miller, William E. Carroll
  • Process for the synthesis of oligomeric vinylamines
    Patent number: 5280077
    Abstract: Vinylamide oligomers and lower molecular weight polymers are prepared by the cationic polymerization of vinylamides in the presence of a Lewis acid at a temperature between -100.degree. and 100.degree. C. The resultant vinylamide oligomers and polymers can optionally be hydrolyzed under acidic or basic conditions to form the corresponding vinylamine oligomers and polymers.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: January 18, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William E. Carroll, Robert K. Pinschmidt, Jr.