Aminosilanes for non-bleed aqueous liquid paper
CA 2132275 A1 · Owner: Sanborn, Kay C. · Inventors: Smith, Linda S.; Sanborn, Kay C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an aqueous correcting fluid the use of which, prevents bleeding of aqueous ink dyes during correction of writing errors or erasure of documents using white out. This is accomplished according to the present invention by the fact that the correcting fluid contains an anionic or non-ionic active binder plus an aminosilanes. The aminosilane-modified correcting fluid of this invention may be substituted for solvent-based fluids, without adversely affecting other properties such as water resistance, opacity and curing.
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
- Filed September 16, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2016.
- 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.