A wiper assembly
CA 2199240 C · Owner: Wiper Shaker Technology Inc. · Inventors: Kelly, Michael John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Various embodiments of a wiper assembly are disclosed which facilitate the removal or shattering of ice or snow debris lodged and trapped beneath a wiper blade during its movement. Embodiments of the invention are disclosed which provide means to overcome normal urging forces of the wiper arm in a direction towards a light transmitting screen member and to urge the wiper arm of the wiper assembly away from the surface of the screen member. Some structures according to the invention may cause the wiper blade to return with an impact force sufficient to break ice and snow debris trapped beneath the wiper blade and also possibly frozen to it. Other embodiments include means for imparting …
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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 5, 1997 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2019.
- 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.