Mold for compression molding a resin article
CA 2020235 C · Owner: Matsumoto, Masahito · Inventors: Matsumoto, Masahito; Matsubara, Shigeyoshi; Usui, Nobuhiro
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 mold for compression molding a resin article. The mold consists of male and female molds, wherein, at the time of complete mold closing, the shortest length L in a mold closing direction of a mated part formed between the outermost wall of the male mold to which a resin melt contacts and the innermost wall of a flange of the female mold satisfies the equation: (t1 - t0 + 10) mm >= L >= (t1 - t0) mm wherein t1 is a distance (mm) between the male and female molds when the resin melt first reaches the horizontally outermost edge of the male mold, and t0 is a distance (mm) in the mold closing direction between the same points on the male and female molds as …
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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 June 28, 1990 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 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.