Melt-colored thick and thin yarn
CA 2058830 A1 · Owner: Basf Corporation · Inventors: Rice, Stuart H.; Rice, Stuart H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, The present invention provides a process for producing a variable denier melt-colored synthetic polymeric filamentous yarn having a random distribution, of light and dark sections produced without dyeing and exhibiting improved dye lightfastness, which comprises creating a melt-colored polymer mixture spinning a melt-, colored yarn from said synthetic melt-colored polymer mixture and subjecting said, melt-colored synthetic yarn to a thick and thin drawing process to produce a filamentous yarn of variable denier. 14
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
- Filed January 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2014.
- 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.