Process for producing hydrogen by alga in alternating light/dark cycle
CA 1194438 A · Owner: Miyamoto, Kazuhisa · Inventors: Yagi, Kiyohito; Miyamoto, Kazuhisa; Miura, Yoshiharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure Hydrogen is biologically, effectively produced by an alga in an alternating light/dark cycle which comprises alternating a step for cultivating the alga in water under light aerobic conditions to accumulate photosynthetic products in the alga and a step for cultivating the alga in water under dark microaerobic conditions to decompose accumulated material by photosynthesis to evolve hydrogen.
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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 October 1, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 1, 2002.
- 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
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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.