High modulus polyethylene
CA 1059278 A · Owner: National Research Development Corporation · Inventors: Ward, Ian M.; Capaccio, Giancarlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oriented high density polyethylene polymer material having a weight average molecular weight of less than 200,000 a number average molecular weight of less than 20,000 a ratio, of weight average molecular weight ?w to number average molecular weight ?n such that for Mn>104, and for ?n?104 , and a Young's modulus greater than 3 x 1010N/m2. The disclosure also includes a process of heat treating a shaped ethylene polymer which is subsequently cooled and drawn.
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 July 31, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 31, 1996.
- 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.