Roof tile securing means
CA 2017548 C · Owner: Waddington, Richard · Inventors: Waddington, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roof tile securing means for securing roof tiles to a roof structure is formed using multiple tile support battens (11) secured to the roof structure (10) each, support batten (11) having upper and lower flanges (13 14) linked by an upstanding web (15). Roof tiles (12) are provided with a slot (18) on an underside surface which allows them to engage the upper flange (13) of a support batten (11). The roof tiles (12) are arranged such that an upper end portion of each tile (12) is supported on the upper surface of a lower flange (14) of one tile support batten (11) and a lower end portion is supported by an upper flange (13) of an adjacent lower batten (11) with the lower end portion …
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 May 25, 1990 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 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.