Hot melt adhesives of improved melt viscosity stability
CA 1050675 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Uschold, Ronald E.; Snow, Austin M. (Jr.)
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The viscosity stability of hot melt adhesives containing an elastomeric linear EPDM, branched ethylene/ propylene copolymer, or propylene/hexene-1 dipolymer is markedly improved by inclusion in the adhesive compsition of boric acid, boric anhydride, or oric acid ester, in combination with a phenolic antioxidant.
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 March 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 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.