Clamp for a roof device
CA 2082370 C · Owner: Thaler, Kenneth · Inventors: Thaler, Kenneth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A clamp for a roof device such as a sleeve for a pipe protruding from a roof having a sealing sheet. There is a skirt, the underside of which abuts a surface of the roof and which underlies the sealing sheet. There is a clamping ring and the sheet is sandwiched between the ring and the skirt. The ring has two lower edges having a downwardly directed concavity defined between them such that a first of the edges abuts the sheet so that an upper surface of the ring may be pressed downwardly by a fastener to press the edge against the sheet to localize compressive forces between the edge sheet, and skirt to seal against entry of water between the sheet and skirt. The device disclosed is a pipe …
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 November 6, 1992 and granted February 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2014.
- 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.