US3421828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfuric acid ester derivatives of 1-anilino - 4 - hydroxy - anthraquinone and mixtures
Assignee: Novartis AG
•
Filing: 1964-07-16
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Granted: 1969-01-14
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Expires: 1984-07-16
Abstract
No abstract record available.
Inventors
- 👤 Hans Peter Kolliker
- 👤 Peter Hindermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:50
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/514; C09B1/5145; C09B62/00; C09B62/44; C09B62/78; C09B62/80; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2195067A
Cited
US2730534A
Cited
US3102894A
Cited
GB928619A
Cited
CH394441A
Cited
FR1309675A
Cited
FR1309676A
Cited
US3270013A
Cited
US3278563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |