Water-based liners for beverage containers
CA 1065524 A · Owner: Ppg Industries, Inc. · Inventors: Maska, Rudolf; Christenson, Roger M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water-based coating composition for use as an internal sanitary liner for metal containers adapted for packing beverages said composition, especially adapted for spray application and consisting essentially of: (A) from about 5 percent to about 60 percent by weight of an amine partially-neutralized interpolymer formed in the presence of a vinyl polymerization catalyst and in the absence of mercaptan said interpolymer being comprised, of: (1) from about 5 percent to about 25 percent of acrylamide or methacrylamide in units of the structure wherein R' is methyl or hydrogen and R is hydrogen or butyl with at least 50 percent of the groups represented by R being butyl;, (2) from about 3 …
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 October 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 30, 1996.
- 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.