Patent US3280154A successfully refreshed from Google Patents.
US3280154A
Expired / Lapsed
US
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5, 6, 7, 8-tetraethyl-anthraquinone-1-carboxylic acid and its 1-anthraquinonyl amide
Assignee: Novartis AG
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Filing: 1962-12-17
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Granted: 1966-10-18
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Expires: 1982-12-17
Abstract
No abstract record available.
Inventors
- 👤 Hopff Heinrich
- 👤 Bolliger Walter
- 👤 Wick Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/42; C07; C07C; C07C66/00; C07C66/02; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
4 words
ACOMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
4 words
ACOMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
5 words
A DYESTUFF OF THE FORMULA:
Claim 4
Dependent Claim
5 words
A DYESTUFF OF THE FORMULA:
References Cited (Backward Citations)
US935878A
Cited
US2181048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |