Patents by Inventor David C. Brownlee

David C. Brownlee 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).

  • Fibrous nonwoven webs
    Publication number: 20040113309
    Abstract: New fibrous nonwoven webs are taught that comprise a mass of polyethylene terephthalate fibers that exhibit a double melting peak on a DSC plot: one peak is representative of a first molecular portion within the fiber that is in non-chain-extended crystalline form, and the other peak is representative of a second molecular portion within the fiber that is in chain-extended crystalline form and has a melting point elevated over that of the non-chain-extended crystalline form. Webs comprising fibers having such a morphology have a unique combination of durability and dimensional stability. The fibers are generally autogenously bonded at points of fiber intersection.
    Type: Application
    Filed: December 5, 2003
    Publication date: June 17, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Delton R. Thompson, David A. Olson, David C. Brownlee, Pamela A. Percha, Myles L. Brostrom
  • Fibrous nonwoven webs
    Patent number: 6667254
    Abstract: New fibrous nonwoven webs are taught that comprise a mass of polyethylene terephthalate fibers that exhibit a double melting peak on a DSC plot: one peak is representative of a first molecular portion within the fiber that is in non-chain-extended crystalline form, and the other peak is representative of a second molecular portion within the fiber that is in chain-extended crystalline form and has a melting point elevated over that of the non-chain-extended crystalline form. Webs comprising fibers having such a morphology have a unique combination of durability and dimensional stability. The fibers are generally autogenously bonded at points of fiber intersection.
    Type: Grant
    Filed: November 20, 2000
    Date of Patent: December 23, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Delton R. Thompson, Jr., David A. Olson, David C. Brownlee, Pamela A. Percha, Myles L. Brostrom
  • Sheet product containing sorbent particulate material
    Patent number: 4429001
    Abstract: New sorbent sheet products are prepared comprising a coherent web of entangled blown fibers prepared by extruding liquid fiber-forming material into a high-velocity gaseous stream and an array of super absorbent polymeric particles dispersed within the web.
    Type: Grant
    Filed: March 4, 1982
    Date of Patent: January 31, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Barbara E. Kolpin, David C. Brownlee