Human and animal tissue photoradiation system
CA 1164952 A · Owner: Clark, William G. · Inventors: Clark, William G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tissue photoradiation system uses a hematoporphyrin or hematoporphyrin derivative dye in tissue to be irradiated and arranges a xenon ion laser 10 for simultaneous lasing. Deep blue light is produced at wavelengths of about 406-427 nanometers and red light at a wavelength of about 627 nanometers by using partially transmitting mirrors arranged at opposite ends of the laser resonator. One of said mirrors has a coating that substantially reflects blue light and partially transmits red light to produce a red light output, and the coating of the other mirror substantially reflects red light and partially transmits blue light producing a blue light output. The blue light output is transmitted …
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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
- Granted April 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2001.
- 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.