Stable package of elongated optical fiber strand material
CA 2098749 C · Owner: Darsey, Ralph Joel · Inventors: Darsey, Ralph Joel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical fiber package of this invention applies a friction enhancing material to the smooth surface of a bobbin or mandrel onto which the optical fiber is wound. The friction enhancing material adheres the initial layer of fiber to the smooth surface of the bobbin thereby, eliminating the need for an independent base structure for establishing and maintaining a winding path for the fiber. Furthermore the friction, enhancing material prevents the lateral movement at initial layer of fiber relative to the bobbin. In accordance with the preset invention the friction, enhancing material is preferably a plastic material such as room temperature vulcanized (RTV) silicones and Styrene Butadiene …
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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
- Filed June 18, 1993 and granted September 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2015.
- 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.