Tufted carpet
CA 2004660 A1 · Owner: Heine, Richard F. · Inventors: Heine, Richard F.; Tharp, Gene E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tufted carpet having a backing which has thereon a plurality of first areas of tufts of fine denier fibers and a plurality of second areas of tufts of at least one looped, uncrimped, coarse denier fiber. Preferred patterns for the areas of tufts are alternating stripes or a checkerboard.
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 December 7, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2011.
- 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.