Lateral impact absorbing cap
CA 2097371 C · Owner: Bishop, Timothy D. · Inventors: Harding, G. Kenneth; Bishop, Timothy D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An impact absorbing protective cap includes a rigid shell which fits on the head of the wearer. The shell is generally hemispherical in shape and terminates in a peripheral edge which defines an open space. An attenuator band is mounted to the inner surface of the shell generally at the peripheral edge for distributing lateral impact forces striking the outer surface of the shell. The attenuator band is made of flexible hard material and is in corrugated form with a series of undulations alternately disposed toward and away from the inner surface of the shell.
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
- Filed May 31, 1993 and granted November 3, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2015.
- 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.