Cellular vinyl acetate/ethylene/n-methylolacrylamide copolymer contact adhesive
CA 2037439 A1 · Owner: Distefano, Frank Vito · Inventors: Distefano, Frank Vito
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous contact adhesive composition comprising an aqueous adhesive copolymer emulsion the adhesive composition having a durometer measured on the type A scale by ASTM D2240 of at least 20 and a blowing agent. The aqueous contact adhesive composition is applied as a coating to a surface of each of two substrates then foamed and substantially dried to provide a dry cellular adhesive coating. The adhesive-coated surfaces are then joined. The preferred contact adhesive composition comprises a vinyl acetate/ethylene/- N-methylolacrylamide copolymer emulsion and contains colloidal 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
- Filed March 1, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2013.
- 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.