Optical waveguide containing p.sub.2o.sub.5 and geo.sub.2
CA 1268971 C · Owner: Corning Glass Works · Inventors: Aggarwal, Ishwar D.; Randall, Eric N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
OPTICAL WAVEGUIDE CONTAINING P2O5 AND GeO2 Abstract of the Disclosure, An optical waveguide having a cladding of high purity glass and a core of high purity glass doped with an amount of P2O5 and GeO2 to increase the refractive index thereof to a predetermined level. The ratio of P2O5 to GeO2 is such that the softening point temperature of the core is compatible with that of the cladding. The core glass has a cation impurity level not exceeding 10 parts per million.
Read the whole patent
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 15, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 2007.
- 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.