Gelled oil filling compounds
CA 1259723 A · Owner: Bicc Public Limited Company · Inventors: Hagger, John M.R.; Corne, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gelled oil filling compound primarily intended for optical cables which meets the standard drainage test at 70°C and is stable to prolonged exposure at -40°C consists essentially of a low aromatic hydrocarbon oil and a block copolymer with a molecular weight In the range 200,000 to 2,000,000. The block copolymer comprises at least one segment tending to confer solubility in the oil and at least one segment tending to inhibit it the preferred, example being the polymer sold under the trade mark KRATON G1651 which has a centre segment which is a random copolymer of ethylene and butylene and two end segments consisting essentially of styrene units.
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 September 19, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 19, 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.