Ultra-high-molecular-weight polyethylene solution
CA 1296464 C · Owner: Sano, Akira · Inventors: Matsuura, Kazuo; Sano, Akira; Yokoyama, Shigeki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present application provides an ultra-highmolecular-weight polyethylene solution which is produced by the steps of subjecting a kerosene fraction having a boiling point of 160 to 300°C to a nucleus hydrogenation treatment at a pressure of 30 to 100 kg/cm2 at a temperature of 100 to 300°C in the presence of a metallic catalyst for nucleus hydrogenation of aromatic nuclei; separating and removing at least a part of n-paraffins present in the kerosene therefrom by the use of a molecular sieve made up of a synthesized zeolite in order to obtain a residual oil; fractionating the latter by a rectification apparatus to obtain a hydrocarbon mixture fraction which has a boiling point of 180 to …
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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.