Method and apparatus for producing thermoplastic resin sheet
CA 2295361 A1 · Owner: Sakamoto, Jun · Inventors: Miyakawa, Katsutoshi; Sakamoto, Jun; Tsunashima, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for producing a thermoplastic resin sheet, in which a melt-extruded running thermoplastic resin sheet is brought into contact with a rotating cooling body to be cooled, and solidified, for producing a cast sheet comprising the use, of an electrifying body rotating in contact with the sheet with, the sheet kept running between the cooling body and the electrifying body. The charges given from the electrifying body rotating in contact with the sheet to the sheet keep the sheet in contact with the surface of the cooling body.
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 January 12, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2022.
- 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.