Hard shell soft core latex
CA 1201944 A · Owner: Polysar International S.A. · Inventors: Sinclair, Alvin R.; Gleason, Edward H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HARD SHELL SOFT CORE LATEX", Abstract of the Disclosure Paper coating compositions providing enhanced gloss and pick characteristics are manufactured from latices comprising heterogeneous polymer particles formed from a monomer composition comprising a monovinylidene aromatic monomer, an aliphatic C4-6 conjugated diene monomer a, C3-6 ethylenically unsaturated carboxylic acid and a C3-6 ethylenically unsaturated primary amide. The polymer particles have an initial domain and a subsequent domain wherein the initial domain has a higher content of the monovinylidene aromatic monomer than the subsequent domain.
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 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 2003.
- 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.