Material-testing method and apparatus
CA 1138218 A · Owner: Zeiss-Stiftung, Carl A Foundation Established Under The Laws Of Germany, Trading As Carl Zeiss · Inventors: Muller, Gerhard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In materials-testing involving comparative examination of the surface of a particular material specimen specimen, surfaces are irradiated with monochromatic light and the Raman spectra of the specimen surfaces are recorded only for certain predetermined spectral regions, the spectral regions having been predetermined through prior recording of the Raman spectra of comparison bodies of different surface character from which, prior recording lines of the spectra which depend on surface character have been selected and classified in accordance with their characteristic properties; characteristic line properties for the specimen recordings are compared to those for the comparison-body …
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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 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- 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.