Head gasket
CA 2186629 C · Owner: Josefsson, Percy · Inventors: Josefsson, Percy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a cylinder head gasket for internal combustion engines. According to the invention the gasket, comprises a laminate which consists in a thin stainless steel plate or a heat-resistant steel plate that is coated on each side with still thinner carrier-calendared rubber films which have a thickness of at least 0.05 mm and which are affixed to the steel plate by vulcanization. The steel plate suitably has a thickness of about 0.2 to 0.4 mm and the rubber films each have a thickness of at least 0.05 to 0.20 mm.
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 April 24, 1995 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2017.
- 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.