Method for detecting radiation dose utilizing thermoluminescent material
CA 2103669 C · Owner: Eichner, Fred N. · Inventors: Durham, James S.; Miller, Steven D.; Eichner, Fred N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The amount of ionizing radiation to which a thermoluminescent material (40) has been exposed is determined by first cooling (70) the thermoluminescent material and then optically stimulating the thermoluminescent material and then optically stimulating the thermoluminescent material by exposure (72) to light. Visible light emitted by the thermoluminescent material as it is allowed to warm up to room temperature is detected and counted (74). The thermoluminescent material may be annealed (76) by exposure to ultraviolet light.
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 February 25, 1992 and granted May 4, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2014.
- 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.