Ear piece having disposable, compressible polymeric foam sleeve
CA 2065449 C · Owner: Chamberlin, Davis W. · Inventors: Chamberlin, Davis W.; Oliveria, Robert J.; Babcock, Martin P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disposably attached to the ear piece of a hearing aid; which includes any sound transmission device, is a user-disposable slave (100 or 115) comprising soft polymeric retarded recovery foam that can be compressed to be freely insertable into a person's ear and allowed to recover to become wedged in the canal. Preferably the sleeve is disposably attached to the ear piece by mating of screw threads on the sleeve (83) and the ear piece (108). The ear piece may be a separate component (80) from the hearing aid. The component (80) is made either of rigid or flexible plastic and has connecting portions (82 or 92) of various lengths depending on the depth of insertion of the sleeve into the …
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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 20, 1990 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2012.
- 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.