Dense paper and method of manufacturing
CA 1048321 A · Owner: Louden, William G. · Inventors: Louden, William G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure:, A dense paper comprising a web of cellulosic fibers and an impregnant dispersed throughout the web the impregnant, consisting essentially of a blend of a rigid polymeric material and an inorganic filler, in stated proportions with the im-, pregnant constituting a minor portion of the finished weight of the paper. A process for producing the paper is disclosed.
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 February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 1996.
- 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.