Process of and apparatus for manufacturing optical fibre preforms for operation in the mid infrared spectral range
CA 1294496 C · Owner: Cselt - Centro Studi E Laboratori Telecommunicazioni S.P.A. · Inventors: Cocito, Giuseppe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Optical fibre preforms for drawing in fibres for use in the mid infrared spectral range are formed by vapourizing halides under the influence of heat and reduced pressure and directing them towards the cooled internal wall of a glass tube which is translated, and also rotated if circumferentially uniform disposition is required so as, to form a preform. The preform so formed may be collapsed, and if the tube is of oxide rather than halide glass its material is stripped from the preform.
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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 January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 2009.
- 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.