Carpet product with integral balancing layer
CA 2007485 C · Owner: Tillotson, John G. · Inventors: Tillotson, John G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CARPET PRODUCT WITH INTEGRAL, BALANCING LAYER" Abstract of the Disclosure, An improved carpet product includes a pile fabric layer and a stabilizing layer adhered to the back of the pile fabric layer to provide dimensional stability against concentrated stresses exerted against the upper surface of the carpet. A balancing layer disposed below the stabilizing layer has thermal response and moisture absorption characteristics selected for compatibility with the pile fabric layer. When the carpet product is exposed to temperature extremes or changes in ambient humidity, stresses exerted by the expansion or contraction of the pile fabric layer create a bending moment around the stabilizing …
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 10, 1990 and granted May 4, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2012.
- 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.