Screw with enlarged head portion for plaster board bracing system
CA 2318795 A1 · Owner: Stanish, Anton John · Inventors: Stanish, Anton John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screw (11) which can fix plaster board in a braced plaster board lined structure has an enlarged head portion (12) having a diameter (D) which is at , least 9.5mm, and preferably at least 10mm or possibly greater. The screw (11) , has a shank (13) which is threaded. The thread of the shank (13) may extend the entire or only part of the length between the head portion (12) and the point (16).
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, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2021.
- 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.