Extending the molten stability of poly(ethylene-vinyl acetate) hot-melt adhesives
CA 1137683 A · Owner: Union Camp Corporation · Inventors: Hollis, Samuel D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure is of a method for extending the molten stability of hydrocarbon resin tackified ethylenevinyl acetate (EVAc) copolymers. One embodiment of the method comprises mixing a lithium salt in the adhesive compositions. The disclosure is also of EVAc-based hotmelt adhesive compositions prepared by the method of the invention and characterized in part by their stability in the molten state.
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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- 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.