Partition wall
CA 2175688 C · Owner: Yoshino Gypsum Co. Ltd. · Inventors: Uchida, Masayuki; Umehara, Kazuyuki; Hasegawa, Tomoya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a partition wall which is characterized in that studs are secured to upper and lower runners fitted to a skeleton in a zigzag arrangement or as common studs; that basic face materials are fitted to the skeleton through sound insulation materials so that the face materials are arranged in parallel, on, both outer sides of the studs while the studs are internally, positioned; and that a hard gypsum sheet comprising fibers dispersed in the gypsum core thereof is arranged on the corresponding outer side of each basic face material. This partition wall is particularly suitable for use as a dry party wall, has satisfactory characteristic properties such as fire protecting …
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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 September 4, 1995 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 4, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2017.
- 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.