Vented exterior building wall and roof structures
CA 1296859 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
Application Of: Cass E. Mulford, For: Vented Exterior Building Wall and Roof Structures Abstract Of The Disclosure, The invention relates to exterior wall and roof constructions wherein a space is provided between an outer sheathing layer and the underlying structure for passage of air to assist in heating cooling and ventilation functions. Perforated channel members are installed in the area at which air enters and/or leaves the vented space, permitting free flow of air while preventing entry of insects, rodents, or other foreign materials into the space. Means may be optionally provided for blocking off air flow through the vent space when desired to assist in heating and cooling …
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 March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- 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.