Water blocking compounds for cables
CA 1213698 A · Owner: Stc Plc · Inventors: Simpson, Walter E.; Bury, John R.I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyurethene sealing compound particularly for use, in water-blocking telecommunications cables comprises a, product obtained from a mixture by weight, of 100 parts of, hydroxy-terminated polybutadiene up to 20 parts of an, additional diol serving as a chain extender 5 to 50 parts, of isocyanate, and up to 2 parts of water. This compound is used to fill the interstices between individual elements of the cable core as well as between other outermost elements and an unwoven polyester tape wound around the core. The sealing compound may fill the interstices in discrete sections of the cable core to provide for water blocking or over the entire length of the cable core to provide for solid …
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 November 4, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 4, 2003.
- 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.