Tire tread
CA 2028892 C · Owner: Goergen, Rene · Inventors: Goergen, Rene; Kummer, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tire tread (11) comprises first and second straight grooves (30 31), which extend circumferentially about the tire one of said straight grooves, being disposed on either side of the equatorial plane (EP) of the tire and delimiting a central portion and two shoulder portions. A plurality of laterally extending zig-zag grooves (32 37; 33, 34) on either side of the, equatorial plane each comprises two sets of legs a first set of three legs (32A, 32B, 32C) extending across the shoulder portion and a second set of two legs (32D, 32E) extending into the central portion the first and second sets of legsbeing circumferentially offset by said straight circumferential groove. The lateral sides of …
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 October 30, 1990 and granted September 1, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.
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.