Data recording method using a metal acetyl acetonate in a light absorbing layer
CA 1090645 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Stromberger-D'Alton-Rauch, Ilse-Dore; Hodum, Claus P.; Glattli, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light-sensitive material which contains iron (III) or manganese(II) acetyl acetonate which has been used sofar for the vesicular method and which was developped with hydrogen peroxide, is irradiated with laser beams of a specific minimum intensity and minimum energy density. -12-
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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 December 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 1997.
- 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.