US2634262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrazolone monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1951-10-02
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Granted: 1953-04-07
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Expires: 1971-10-02
Abstract
No abstract record available.
Inventors
- 👤 Piepenbrink Hans-Frank
- 👤 Bayer Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:43
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
THE MONOAZO DYESTUFF OF THE FORMULA:
References Cited (Backward Citations)
US2060563A
Cited
US2289210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |