Polyester filaments, yarns and tows
CA 1313038 C · Owner: Invista Technologies S.A.R.L. · Inventors: Noe, James Bennett; Knox, Benjamin Hughes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, Improvement in Polyester Filaments Yarns and Tows, Drawing, especially cold-drawing of, spin-oriented crystalline polyester filaments and, particularly polyester feed yarns that have been, prepared by spinning at speeds of e.g. 4 kg/min, and, have low shrinkage and no natural draw ratio in the conventional sense, provides useful technique for obtaining uniform drawn filaments of desired denier and thereby provides improved flexibility to obtain filaments and yarn of various denier. The resulting drawn uniform filaments have useful properties that are improved in certain respects. 1198m DP-4040, DP-4040
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 26, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.