Slide member with surface composed of pyramidal microprojections
CA 2069988 C · Owner: Fujisawa, Yoshikazu · Inventors: Narishige, Takeshi; Fujisawa, Yoshikazu; Tsuji, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A slide member includes a surface layer having a slide surface for a mating member. The surface layer has a plurality of pyramid-shaped projections protruding from a phantom plane thereby defining the slide surface along the phantom plane. The percent area A of the pyramid-shaped projections occupied in the slide surface is in a range of A ? 50%. The inclination angle .THETA. of the pyramid-shaped projection formed by a line passing its apex and the central portion of its base surface with respect to a reference line perpendicular to the phantom plane is in a range of 0° ? .THETA. ? 30°.
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 May 29, 1992 and granted March 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 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.