Expired Canadian patentCanada
Sole for shoes and process for the production thereof
CA 1083811 A · Owner: Distropat Ag · Inventors: Ehrlich, Johann, Jr.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a sole for a shoe comprising two preformed wooden parts connected together in the area of the sole adapted to receive the ball of the foot by means of a flexible intermediate part, consisting of foamed polyurethane.
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 August 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 20, 1977
GrantedAugust 19, 1980
Term endedAugust 19, 1997
Patent numberCA 1083811 A
Classification (IPC)A43B13/08 +1 more
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.