US3772171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel quick setting inks
Assignee: BASF Corp
•
Filing: 1971-04-05
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Granted: 1973-11-13
•
Expires: 1991-04-05
Abstract
Abstract Novel quick-setting inks which contain photosensitizers and are rapidly cured to a set-off-free state by exposure to ultraviolet light. Use of anti-set-off agents such as powder sprays is thus eliminated.
Inventors
- 👤 R Savageau
- 👤 P Whyzmuzis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
20 words
The ink composition of claim 1 wherein the photosensitizer has a triplet energy between about 42 and about 85 kcal/mol.
Claim 2
Dependent Claim
21 words
The ink composition of claim 2 wherein the effective amount of photosensitizer is between about 1% and 20 percent by weight.
Claim 3
Dependent Claim
18 words
The ink composition of claim 3 wherein the amount is between about 3 and 12 percent by weight.
Claim 4
Dependent Claim
14 words
The ink composition of claim 2 wherein the photosensitizer comprises benzophenone and Michler''s Ketone.
Claim 5
Dependent Claim
97 words
In a process of setting a conventional solvent-containing quick-setting ink comprising printing the ink on an absorbent substrate and setting the ink to a set-off-free state by breaking the solubility balance and absorbing the solvent into the substrate, the improvement comprising accelerating the breaking of the solubility balance and the absorption and subsequent curing by including in the ink prior to printing an effective amount of an actinic radiation sensitizer and exposing the printed substrate to an amount of actinic radiation means effective to substantially increase the rate of the absorption of the solvent into the substrate.
References Cited (Backward Citations)
US2347436A
Cited
US3147116A
Cited
US3316189A
Cited
US3499781A
Cited
US3462267A
Cited
US3552986A
Cited
US3673140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |