Styrene-based polymer moldings and process for production thereof
CA 1330699 C · Owner: Nakano, Akikazu · Inventors: Nakano, Akikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Styrene-based polymer moldings with a crystallinity of at least 20% obtained by subjecting moldings of crystalline styrene-based polymers having mainly syndiotactic configuration to heat treatment at a temperature of 120 to 270°C. These moldings are excellent in physical properties such as heat resistance and chemical resistance and thus are, expected to find various applications for example, in, general construction materials electric or electronic, devices, and car parts.
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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
- Granted July 19, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 19, 2011.
- 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.