Ultraviolet radiation dosimeter
CA 2124508 C · Owner: Consolidated Grand National Resources Inc. · Inventors: Gajdics, Tibor F.; Wade, Adrian P.; Skinner, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A personal ultraviolet radiation dosimeter compares signals from a number of photodetectors responsive to different portions of the electromagnetic spectrum to determine cumulative and instantaneous exposure to ultraviolet radiation. The method of signal comparison permits the personal dosimeter to be constructed with small and inexpensive filters.
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 27, 1994 and granted August 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2016.
- 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.