Gasket material
CA 2133084 A1 · Owner: Hollingsworth & Vose Company · Inventors: Foster, Richard P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite gasket material includes a fiber component (3-15 % by wt.), an elastomeric binder component (3-15 % by wt.) and a, solid filer component (60-90 % by wt.). The material may additionally include a phenolic or epoxy resin (up to 5 wt. %) and a silicone resin (up to 5 wt. %). The filler includes as a component a salt formed from a multivalent metal cation and a sterically hindered dicarboxylic acid. The salt ingredient typically comprises from about 20 to 80 wt. % of the filler. Gaskets made from this composite material exhibit improved sealability and thermal stability while retaining other desirable mechanical properties. These materials are able to withstand operating …
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 March 29, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 2015.
- 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.