Masterbatch pellets
CA 1104300 A · Owner: Phillips Cables Limited · Inventors: Beach, Shirley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pellets are provided comprising predetermined amounts of a pigment and a blowing agent in a polymer matrix. The pellets can be added to an extruder together with a polymer insulating material for the formation of colour-coded cellular insulation on a conductor wire of a communication cable. The composition of the pellets is so determined that different colour-coded, cellular, insulating coatings can be produced which are dielectrically matched.
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 June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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.