Building wall construction
CA 1285368 C · Owner: Mulford, Cass E. · Inventors: Mulford, Cass E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wall construction for both exterior and interior walls which is particularly adapted for fire protection minimizing, the possibility of burn-through from one side to the other of a construction utilizing wood portions. The basic structural member which forms the studs, top plates and sills or bottom plates, includes a pair of elongated, spaced wooden members joined by a web structure of fire-rated gypsum board. Preferably in addition to the sheathing layers on each side of the studs an, interior panel is provided, separating the space between the sheathing layers into two separate spaces one of which may be, filled with fireproof insulation and the other utilized for plumbing, electrical …
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
- Granted July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2008.
- 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.