Dye solvents for pressure-sensitive copying systems
CA 1061055 A · Owner: Solutia Inc. · Inventors: Herber, John F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Solvent compositions useful to dissolve dyes employed in pressure-sensitive copying systems comprise: (A) about 45 to 75 weight percent of one or more compounds having the general formula, wherein R and R' can be the same or different and are selected from the group consisting of hydrogen methyl, and ethyl; and, (B) about 55 to 25 weight percent of (i) hexylbenzene; or, (ii) a composition comprising about 45 to 75 weight percent C10 to C16 alkanes and the balance C7 to C10 alkylbenzenes.
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 August 28, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 28, 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.