Umbrella cover constructure of non-axis connective line
CA 2034669 C · Owner: Lai, Chen Min · Inventors: Lai, Chen Min
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the umbrella cover for use with an umbrella structure having a plurality of umbrella ribs. The cover is comprised of a normally planar cover cloth coupled to the umbrella structure. The cover cloth has a warp extending in a first direction and a weft extending in a second orthogonal direction. The cover cloth has a closed stepped outer contour which defines a plurality of perimeter edges disposed in a parallel relationship with either the warp or the weft. The perimeter edges define a plurality of vertices for respective coupling to end portions of the plurality of umbrella ribs.
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 24, 1991 and granted May 24, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 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.