Printing ink
Abstract
Abstract This invention relates to printing inks for use on coarse or other paper or liquid-permeable base material comprising a coloring agent and a varnish, said varnish having a PH below 7 consisting essentially of a solution in 20-100 parts by weight of a glycol solvent of (a) 100 parts by weight of acid resin plus up to 30 parts by weight of an adduct-forming acid for every 100 parts of base resin and having an acid number of at least 60 and (b) the water-soluble salt formed by reaction of the acidic resin with between about 1 to 6 parts by weight of a monomeric, watersoluble, volatile amine, the amount of amine used being equivalent to no more than 75 percent of the acidity of the resin, said solution in said solvent of said resin, amine and salt being substantially free from amide.
Inventors
- 👤 Jake Walter Hoffman Jr
- 👤 Gregory Joseph Huelsman
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |