US3215710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of 1-hydroxy-4-phenylaminoanthraquinone compounds
Assignee: Novartis AG
•
Filing: 1962-01-04
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Granted: 1965-11-02
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Expires: 1982-01-04
Abstract
No abstract record available.
Inventors
- 👤 Hindermann Peter
- 👤 Kolliker Hans Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:45
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/514
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
PROCESS FOR MAKING 1-HYDROXYPHENYLAMINO ANTRAQUINONES COMPRISING (A) REACTING AT A TEMPERATURE OF ABOUT 100* TO 150*C. A, MIXTURE OF KCOMPOUND OF THE FORMULA
Claim 2
Dependent Claim
23 words
PROCESS FOR MAKING 1-HYDROXYPHENYLAMINO ANTRAQUINONES COMPRISING (A) REACTING AT A TEMPERATURE OF ABOUT 100* TO 150*C. A, MIXTURE OF KCOMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2419405A
Cited
US2777863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |