Magnetic recording medium having segmented copolyester binder
CA 1076895 A · Owner: Minnesota Mining And Manufacturing Company · Inventors: Pletcher, Wayne A.; Vermillion, Russell L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Magnetic recording tape the binder of Which, segmented copolyester of crystallizable ester units and amorphous ester units, where R1 may be the divalent radical of adipic acid R2, may be the divalent radical of 1,4-cyclohexanedimethanol R3 may be R1 or the divalent radical of C36 dimer acid R4 may be R2 or the divalent radical of a polyetherglycol of 200-4000 molecular weight.
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 6, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 6, 1997.
- 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.