Developer for pressure-sensitive recording sheets, aqueous dispersion of the developer and method for preparing the developer
CA 1339023 C · Owner: Sanko Kaihatsu Kagaku Kenkyusho · Inventors: Shiraishi, Tetsuo; Saito, Toranosuke; Shiozaki, Tomoharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A developer comprising at least one polyvalent metal salt of a nuclear substituted salicylic acid of the following general formula is provided. ---I In the formula, R1 represents an alkyl group having from 1 to 12 carbon atoms, R2 represents a hydrogen atom or an alkyl group having from 1 to 12 carbon atoms R3 represents, a hydrogen atom or a methyl group provided that at least one of R1 and R2 is a secondary butyl group a secondary hexyl, group, an isohexyl group a secondary octyl group, an, isononyl group a secondary decyl group, a secondary dodecyl group or an isododecyl group and the total number of the carbon atoms in R1, R2 and R3 is from 9 to 18 M is a, polyvalent metal atom, and m …
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 March 25, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 2014.
- 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.