US2517613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid dyestuffs of the anthraquinone series and a process of making same
Assignee: Sandoz AG
•
Filing: 1947-07-05
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Granted: 1950-08-08
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Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Allmen Samuel Von
- 👤 Eggenberger Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:07
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/30; C09B1/303
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
AS NEW ARTICLES OF MANUFACTURE THE ACID ANTHRAQUINONE DYESTUFFS OF THE GENERAL FORMULA
References Cited (Backward Citations)
US1843308A
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US1821943A
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US1885065A
Cited
US1898861A
Cited
US2042757A
Cited
GB462694A
Cited
US2453285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |