Medium density pipe blends and pipe made therefrom
CA 1106521 A · Owner: Union Carbide Corporation · Inventors: Lucchesi, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Blend of thermoplastic resin and pipe made there-, from, having a density of 0.926 to 0.940 grams per cubic centimeter, a melt index of 0.10 to 2.0 decigrams per minute;, a high density ethylene polymer having a density of greater than 0.940 to 0.965 grams per cubic centimeter and a melt index of 0.10 to 2.0 decigrams per minute; and a low density ethylene copolymer having a density of 0.910 to 0.925 grams per cubic centimeter and a melt index of 0.10 to 2.0 decigrams per minute.
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 August 4, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 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.