Polyesters from trans-4,4'-stilbenedicarboxylic acid and 1,6-hexanediol
CA 1323133 C · Owner: Morris, John Craft · Inventors: Morris, John Craft; Jackson, Winston Jerome, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
POLYESTERS FROM TRANS-4,4'-STILBENEDICARBOXYLIC ACID AND 1,6-HEXANEDIOL, Abstract, Disclosed are polyesters containing repeating units from trans-4,4'-stilbenedicarboxylic acid and 1,6-hexanediol, the polyesters having an I.V. of at least 1.20, a tensile strength of at least 20,000 psi (1406.2 kg/cm2) in 1/16-in. (0.159 cm) thick injection-molded bars, and a melt viscosity of 3000 poise or less at 265°C and a shear rate of 107 sec-1.
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 October 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 12, 2010.
- 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.