Composition for reinforced and filled high density rigid polyurethane foam products and method of making same
CA 1069266 A · Owner: Tecnik International Corporation · Inventors: Deaver, Dann T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition for reinforced high density rigid polyurethane products including conventional rigid polyurethane foam materials and including silica sand as a filler in quantities ranging from 10% to 75% by weight and chopped glass fibers as a reinforcing agent in quantities ranging from 3% to 25% by weight and the method of making the same with the products having a density of from about 10 to about 80 lb/ft3.
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 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.