Polyacetal resin composition and sliding member
CA 2026072 C · Owner: Polyplastics Co. Ltd. · Inventors: Takayama, Katsunori; Endo, Toshihiko; Matsunaga, Nobuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polyacetal resin molding compositions and sliding members formed thereof exhibit anti-friction and abrasion-resistance properties, The polyacetal resin molding compositions include (A) 100 parts by weight of a polyacetal base resin, (B) between 0.5 to 40 parts lay weight of a branched or crow-linked graft copolymer which is a graft-reaction product of (a) an olefin polymer, and (b) a vinyl or ether polymer, (C) between 0.1 to 20 parts by weight of a lubricant, and (D) between 0.5 to 30 parts by weight of an inorganic powder having a mean particle diameter of 50µm or less and a content of particles having a particle diameter of 100µm or less of at least 95%.
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 September 24, 1990 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2012.
- 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.