Disc cartridge
CA 2010633 C · Owner: Ishimatsu, Yoshikazu · Inventors: Ishimatsu, Yoshikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disc cartridge is comprised of a cartridge body and a reinforcing member. The cartridge body is formed of a pair of cartridge halves, each of which is made of a synthetic resin and has an opening portion extended from a central portion of at least one of the pair of cartridge halves to one side wall portion so as to expose one portion of a disc-shaped record medium rotatably accommodated therein outside and a portion in which outer end portions of the opening portion of the one side wall portion are coupled is formed thin. The reinforcing member is made of a material having a mechanical strength higher than that of the pair of cartridge halves to reinforce the thin coupling portion formed …
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 February 22, 1990 and granted July 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 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.