Box spring assembly with improved end stiffness
CA 1099419 A · Owner: Hoover Universal, Inc. · Inventors: Kitchen, John P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spring and frame assembly particularly for box springs, for beds of extended length consisting of a plurality of main, springs arranged criss-cross fashion on a rectangular supporting frame to form a load supporting deck having a regular array of rectangular spaces, and internal support springs mounted on the frame extending diagonally across associated rectangular spaces and secured to the main springs. Each internal support spring has a main body portion and depending end portions which resiliently support the main body portion in spaced relation above the frame. Selected ones of the internal support springs have longer main body portions than the remaining internal support springs and …
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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
- Granted April 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 1998.
- 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.