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Patent US2940815A successfully refreshed from Google Patents.
US2940815A
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Vat dye compositions containing benzotriazoles
Assignee: GAF Chemicals Corp
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Filing: 1953-12-04
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Granted: 1960-06-14
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Taras John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:01
CPC Classifications
C; C09; C09B; C09B9/00; D; D06; D06P; D06P1/00; D06P1/22; D06P1/28; D06P1/44; D06P1/64; D06P1/642; D06P1/6426
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A DYESTUFF COMPOSITION COMPRISING A SALT OF AN ACID POLYBASIC ACID ESTER OF A LUEOC VAT DYESTUFF AND A BENZOTRIAZOLE SELECTED FROM THE CLASS CONSISTING OF THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
29 words
A DYESTUFF COMPOSITION COMPRISING A SALT OF AN ACID POLYBASIC ACID ESTER OF A LUEOC VAT DYESTUFF AND A BENZOTRIAZOLE SELECTED FROM THE CLASS CONSISTING OF THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
US2372370A
Cited
US2389245A
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US2024502A
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US2406586A
Cited
US2559807A
Cited
US2540799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |