Windshield wiper blade
CA 2032687 A1 · Owner: Acushnet Rubber Company, Inc. · Inventors: Walder, James F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure The wiper blade is made from an elastomeric composition which contains a fluorocarbon polymer as an essential ingredient therein. The elastomeric composition comprises:, 100 parts by weight of rubber composition (phr); 0 to 60 phr of filler;, 0 to 25 phr of inorganic base; and 0 to 5 phr of processing aid;, the rubber composition being made up of 50 to 0 100 phr of a fluorocarbon polymer and 50 to 0 phr of a non-fluorocarbon polymer. Such a blade is found to have improved wear.
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 December 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 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.