US2625542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyes from 2-aminothiophene
Assignee: Wyeth Holdings LLC
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Filing: 1950-10-19
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Granted: 1953-01-13
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Expires: 1970-10-19
Abstract
No abstract record available.
Inventors
- 👤 Long Robert Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:18
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B35/10; C09B35/14; C09B35/021; C09B35/033
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
9 words
THE WATER INSOLUBLE AZO COMPOUND HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |