Composition for mold curing elements
CA 2106311 C · Owner: Tracey, Donald Sheley · Inventors: Tracey, Donald Sheley; Costemalle, Bernard Jean; Gardner, Irwin Jerome
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition suitable for use in producing mold curing elements is provided. The composition comprises a halogen-containing copolymer of a C4 to C7 isomonoolefin and a para-alkylstyrene; a filler such as carbon black, a process oil, and a curing agent. A curing element comprising the composition is also provided.
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 10, 1992 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2014.
- 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.