US2760967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid dyestuffs of the anthraquinone series
Assignee: Novartis AG
•
Filing: 1953-07-20
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Granted: 1956-08-28
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Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 Hindermann Peter
- 👤 Jung Jean-Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34; C09B1/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AN ACID DYESTUFF OF THE ANTHRAQUINONE SERIES HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
11 words
AN ACID DYESTUFF OF THE ANTHRAQUINONE SERIES HAVING THE GENERAL FORMULA:
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |