Patents by Inventor Paul L. I. Carr

Paul L. I. Carr 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).

  • Polyester yarns produced by high speed melt-spinning processes
    Patent number: 4743504
    Abstract: A spun polyester yarn containing ethylene terephthalate as the main or only recurring unit characterized by a percentage crystallinity (.beta..times.10.sup.2) of less than 20, a birefringence (.DELTA.n) of at least 50.times.10.sup.-3, a function A greater than 28 and a function B.gtoreq.16 where ##EQU1## and B=(A-100 .beta.) and wherein-IV is the intrinsic viscosity of the spun yarn, .DELTA.n is the birefringence of the spun yarn and (dpf) is the filament decitex of the spun yarn.
    Type: Grant
    Filed: September 14, 1983
    Date of Patent: May 10, 1988
    Assignee: Imperial Chemical Industries Limited
    Inventor: Paul L. I. Carr
  • Filament yarn
    Patent number: 4523427
    Abstract: A yarn of a synthetic, fibre-forming, polymeric material comprising a plurality of filaments having a substantially rectangular cross-section and having a birefringence assymetry across the width of the filaments, each of the filaments being twisted about the longitudinal axis of the filament in such a manner that the overall lateral dimension of the twisted filament corresponds substantially with the length of the rectangular cross-section of the filament.
    Type: Grant
    Filed: August 20, 1984
    Date of Patent: June 18, 1985
    Assignee: Imperial Chemical Industries Limited
    Inventor: Paul L. I. Carr
  • Process for the manufacture of polyamide yarns
    Patent number: 4338276
    Abstract: Manufacture of polyamide yarns by a high speed draw spinning process in which the yarns are passed through defined fluid environments. Yarns are comparable in properties with conventional spin-lag-draw yarns.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: July 6, 1982
    Assignee: Imperial Chemical Industries, Ltd.
    Inventor: Paul L. I. Carr
  • Process for the manufacture of polyester yarns
    Patent number: 4338275
    Abstract: Manufacture of polyester yarns by a high speed draw spinning process in which the yarns are passed through defined fluid environments. Yarns are comparable in properties with conventional spin-lag-draw hot relax yarns.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: July 6, 1982
    Assignee: Imperial Chemical Industries Limited
    Inventor: Paul L. I. Carr