High speed corrugating adhesives
CA 1064025 A · Owner: Cpc International Inc. · Inventors: Klein, Gary H.; Stevens, Donald G.; Stejskal, Joseph F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
High speed corrugating adhesives are provided based upon the use of certain specified saponifiable starch ester materials. These may be in the form of no-carrier type formulations, in which a single phase is present whereinthe starch material is in the form of partially swollen granules. Alternatively the formulation may have a carrier phase and an adhesive phase. The specific formulations described have superior properties that permit higher corrugating machine speeds
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 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 9, 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.