Copolyester fiber
CA 1301996 C · Owner: Ogawa, Kimihiro · Inventors: Iohara, Kohichi; Yamada, Setsuo; Suzuki, Togi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved copolyester fiber capable of being dyed with cationic dyes and having an excellent brightness heat resistance and a satisfactory mechanical strength comprises a copolyester resin comprising a polymerization product of at least one aromatic dicarboxylic acid compound, at least one alkylene diol compound and at least one quaternary phosphonium organic sulfonate of the formula (I):, (I), wherein A - an aromatic or aliphatic radical X1 = H, or an ester-forming organic radical X2 = an ester-, forming organic radical R1, R2, R3 and R4 - an, alkyl or aryl radical n = 1 or more, and having an nf, of 0.5 ox more the copolyester fiber having a silk, factor of 25 or more and exhibiting the …
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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.