Extruded closed cell thermoplastic foam
CA 1269798 C · Owner: Collins & Aikman Corporation · Inventors: Stull, Thomas E.; Conley, Kenneth E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Useful resilient extruded closed cell foam compositions are produced by the present invention by forming an extrudable blend comprising a heat activatible chemical blowing agent and a polymer component consisting essentially of chlorinated polyethylens and at least one other thermoplastic polymer. The amount of chlorinated polyethylene is from .025 to .5 parts per part of the thermoplastic polymer. The blend is extruded at a temperature below the activation temperature of the blowing agent to form an unfoamed thermoplastic sheet and, the sheet is thereafter heated to a temperature sufficient to activate the blowing agent and expand the sheet and produce a …
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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 May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
- 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.