Expired Canadian patentCanada
Progressive addition spectacle lens
CA 2007130 C · Owner: Sola International, Inc. · Inventors: Winthrop, John T.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lenses are presented in occupational, dynamic activity and general purpose configurations, len lenses all being of compatible polar or bipolar progressive power design to form a series of progressive power lenses.
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
- Filed January 4, 1990 and granted July 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 4, 1990
GrantedJuly 30, 2002
Term endedJanuary 4, 2010
Patent numberCA 2007130 C
Classification (IPC)G02C7/06 +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.