US3945990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo compounds containing an alkanolamine substituted triazine component
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1973-10-05
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Granted: 1976-03-23
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Expires: 1993-10-05
Abstract
Abstract A compound of the formula, as a free acid, WHEREIN X is an alkanolamine residue, such as diethanolamine, which is useful for dyeing paper and pulp to give yellow dyeings with good light fastness.
Inventors
- 👤 Takuo Ikeda
- 👤 Takushige Hadano
- 👤 Syunsuke Nogi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:34
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/78; C09B62/82; C09B62/83; C09B43/00; C09B43/12; C09B43/136; C09B43/16; D; D21; D21H; D21H21/00; D21H21/14; D21H21/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A compound of the formula, as a free acid, ##SPC7## wherein X is selected from the group consisting of monoethanolamine, diethanolamine, monopropanolamine and dipropanolamine.
Claim 2
Dependent Claim
24 words
A compound of the formula, as a free acid, ##SPC7## wherein X is selected from the group consisting of monoethanolamine, diethanolamine, monopropanolamine and dipropanolamine.
Claim 3
Dependent Claim
6 words
A compound of the formula, ##SPC8##
Claim 4
Dependent Claim
6 words
A compound of the formula, ##SPC8##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |