Unsaturated polyester molding compounds and the articles thereof
CA 2000853 A1 · Owner: Okuno, Toshifumi · Inventors: Okuno, Toshifumi; Nakagawa, Nobuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An unsaturated polyester molding compound of which viscosity at 25°C is about 107 centipoise or more containing (1) glass fiber of about 0.05 to 3 mm in length, (2) 4-methyl-2,4-diphenylpentene-1 and (3) a, transparent filler can give glossy transparent, thick, profile articles without cracking even at high temperatures. Therefore, the molding compound is used advantageously for production, for example of bathtubs, kitchen counters, and lavatory and dressing tables.
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 October 19, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 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.