Auxillary die for gloss control
CA 2087330 A1 · Owner: General Motors Corporation · Inventors: Pickett, Thomas J.; Kratzner, John P. (Deceased); Wenzel, Edward J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, An auxiliary die member for use in combination with a conventional extrusion die for controlling the gloss appearance of an extrudate including a die body having flow channel means in fluid communication with the die opening in the extrusion die and insulating means disposed between the die body and the extrusion die for substantially preventing heat flow between them.
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 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2015.
- 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.