Windproof umbrella
CA 2045471 C · Owner: Holtz, Leonard · Inventors: Hochfeld, Stanley; Johnson, Gary D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A windproof umbrella includes a post (14); a plurality of ribs (18) extending outwardly in a radial direction from the upper end of the post; a lower canopy (20) secured on the ribs (18); a plurality of vent holes (34) therethrough; and an upper canopy (36) positioned on the lower canopy (20) and covering all lower vent holes (34). The upper canopy (36) is smaller than the lower canopy (20). Elastic fastening straps (48) secure the upper canopy (36) to the free end portions of the ribs (18) for permitting the upper canopy to elastically lift up responsive to wind. The upper canopy (36) may include at least one vent hole (76) closer to the free ends of the ribs (18) than the lower vent holes …
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 February 9, 1990 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 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.