Chair base
CA 1303475 C · Owner: Edwards, Thomas M. · Inventors: Edwards, Thomas M.; Nagelkirk, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A chair base comprises a central hub (10) around which are arranged parallel pairs of quarter sine wave shaped steel straps (16) which radiate outwardly in an equally spaced apart configuration. A caster socket block (20) is interposed in the space between the two straps of each pair thereof at an outer end (18). The central hub (10) and the caster sockets (20) are covered by plastic shells (34), and the exposed steel straps (16) are coated.
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 June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 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.