Hazard warning device
CA 2072970 A1 · Owner: Saubolle, Malcolm C. · Inventors: Saubolle, Malcolm C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hazard warning device for use in place of a conventional flare has a lamp assembly using a long shelf life battery (B1) to over-run a light emitting diode (LED1) under control of a low duty cycle low frequency oscillator (U1). The lamp assembly is built into a lens (4) at one end of a baton-like device the remainder of, which is a stem-like body (2) provided with a strut assembly (30 32, 34, 36, 38, 40, 42, 44, 46) similar to an umbrella frame which can be deployed between a folded condition lying against the stem and a deployed condition in which struts (46) form a tripod support for the device. Deployment of the strut assembly also activates a switch (50) to energize the lamp assembly.
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 September 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2013.
- 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.