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Expired Canadian patentCanada

Self-sustaining power module

CA 1301838 C · Owner: Cota, Albert O. · Inventors: Cota, Albert O.; Reed, John J.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A self-sustaining power module (10) that combines the technologies of radioactivity with photovoltaic cells (12) to produce an electrical power supply having a useful life of over ten years. The radioactive source is a tritium capsule (22) that interfaces with the receptor surface of the photovoltaic cell (12). The capsule (22) has inside surfaces that are coated with a phosphor and is filled with tritium gas (26). The tritium gas produces beta particles that bombard the phosphor (18) causing the phosphor to luminesce and produce photons. The photons in turn, strike and cause the photovoltaic cell (12) to generate a current flow that is then applied via a pair of electrodes (30),(32), to an …

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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 17, 1989
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301838 C
Classification (IPC)H01L31/11 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJan 17, 1989Patent grantedMay 26, 1992Term endedMay 26, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.