Assault deterrent
CA 2059534 A1 · Owner: Richards, John · Inventors: Jarvis, Colin P. G.; Richards, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2059534 9102338 PCTABScor01, A device to deter a potential assailant consists of an item to be worn or held, such as a glove or a wrist-band or a "knuckle-duster" on which is mounted one or more containers which contain a dye, which may be in the form of a paste the container being, adapted to break when being brought into contact with an assailant. The assailant will thus be visibly marked. If the device is brightly coloured or otherwise recognisable a potential assailant will be deterred from making an attack.
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 August 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 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.