Crystalline colloidal narrow band radiation filter
CA 1257796 A · Owner: University Of Pittsburgh · Inventors: Asher, Sanford A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A narrow wavelength band filtering device is provided by forming a highly ordered crystalline colloidal structure within a cell. The crystalline colloidal structure is relatively thin and has substantially planar and substantially parallel surface portions. The crystalline colloidal structure is formed by dispersing electrically charged particles, e.g. polystyrene spheres within an appropriate, solvent. The filtering device of the present invention may form the basis for a mechanically simple and highly efficient monochromator as, well as find application in an improved system for investigating the Raman and/or emission spectra of selected sample materials. In addition, a novel multiple …
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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 July 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 25, 2006.
- 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.