Heavy metal fluoride glass containing indium trifluoride
CA 2207442 C · Owner: Galileo Corporation · Inventors: Vacha, Lubos J.B.; Akella, Annapoorna; Downing, Elizabeth A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heavy metal fluoride glass composition for an optical fiber in mole percent, about: 20 to 40% InF3, 20 to 0% GaF3 2 to 10% PbF2, 0 to 25% , ZnF2, 0 to 25% CdF2 10 to 25% BaF2, 0 to 6% NaCl, 0 to 6% NaF 0 to , 7% SrF2 and 0 to 5% CaF2; the total of InF3 and GaF3 being about 40%; the total of BaF2, SrF2 and CaF2 being about 25%; the total of ZnF2 and CdF2 being about 25%, and the total of NaCl and NaF being about 6%; said composition being further doped with a lanthanide series heavy metal fluoride in an amount up to about 1%.
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
- Filed October 10, 1996 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2018.
- 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.