Log for log home
CA 2557364 C · Owner: Wrightman, Robert A. · Inventors: Wrightman, Robert A.; Wrightman, Ronald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A log is provided that has a pair of oppositely directed faces one of the faces having a pair of tongues separated by a channel and the other face having a pair of grooves separated by a ridge. The tongues grooves, ridge and channel respectively are dimensioned so as to inter-engage when logs are placed one on top of another. The base of the channel is spaced from the end face of the ridge to accommodate a pair of seals that are maintained laterally spaced apart in the channel so as to define an air space therebetween. A thermal break is thus provided between the seals in the channel to inhibit conduction of heat through the seal.
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 August 28, 2006 and granted June 2, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.