Rebar and beam bolster, slab and beam bolster upper
CA 1317474 C · Owner: Langley, Marshall E. Jr. · Inventors: Langley, Marshall E. Jr.; Turek, James N.; Sims, Richard M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bolster (10) is constructed of non-biodegradable material. The bolster (10) includes an elongated support member (12) and legs (14) for holding the support member in an upright position. An assembly (20, 22) is also provided to serially connect the bolsters together. More specifically one end of, the bolster includes a male connector (20) and the opposite end a female connector (22). The non-biodegradable material is impervious to water and both shatter-resistant and sag-resistant within a temperature range between 220° and -40°F. The material also has a flex modulus of between 200,000 and 1,500,000. Preferably, the material also bonds with concrete so as to form a substantially …
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 May 11, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 11, 2010.
- 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.