Patent Yard Sign in
Expired Canadian patentCanada

Manufacture of draw-redraw cans using an irradiated film laminated or extrusion coated steel sheet material

CA 1184875 A · Owner: The Dow Chemical Company · Inventors: Hitchcock, Martin K.; Potter, Craig W.; Romesberg, Floyd E.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

The use of organic solvent-based coating compositions in the preparation of coated steel feedstock for use in the manufacture of draw-redraw food and beverage cans is eliminated by using as such can feedstock a laminated or extrusion coated steel sheet (e.g. such as electrolytic chrome/chrome oxide coated steel) having adhered to both major planar surfaces thereof an irradiated multilayered synthetic thermoplastic resin coating comprising:, (1) an adhesive synthetic thermoplastic resin inner layer which is composed of at least a major proportion of a normally solid random copolymer of ethylene with from 1 to 30 weight percent based upon, the weight of such copolymer of an ethylenically, …

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 April 2, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 18, 1982
GrantedApril 2, 1985
Term endedApril 2, 2002
Patent numberCA 1184875 A
Classification (IPC)C08J3/28 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedMarch 18, 1982Patent grantedApril 2, 1985Term endedApril 2, 2002

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.