Tires with high strength reinforcement
CA 2317943 C · Owner: Helfer, Farrel Bruce · Inventors: Helfer, Farrel Bruce; Kim, Dong Kwang; Shemenski, Robert Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reinforced layer of elastomer for reinforcement of elastomeric articles having at least one layer of cord spaced in a direction lateral to the direction of reinforcement, each cord having a diameter in the range of 0.30 mm to 1.6 mm and formed in a single step where all its filaments have the same lay direction each cord, made of steel having a cord break load (CBL) defined by the expression:, CBL = N (20.4D2 - 352.6D3) CE where CE is the cord efficiency, D is the filament diameter in MM and N is the number of filaments in each cord.
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 March 21, 1991 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2013.
- 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.