Skivable billet and products
CA 1086628 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Wegwerth, Arthur A.; Lowrey, Robert D.; Cobb, Sanford Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A skivable billet having improved uniform heat absorptive ability in which layers or enhanced optical density comprise water soluble polyazo direct dyes such as Formanil Black G and finely divided silica.
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
- Granted September 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 1997.
- 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.