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US2436697A
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Sulfofluorides of azoic dyestuffs
Assignee: Wyeth Holdings LLC
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Filing: 1944-07-31
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Granted: 1948-02-24
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Expires: 1964-07-31
Abstract
No abstract record available.
Inventors
- 👤 Lecher Hans Zacharias
- 👤 Prescott Robert
- 👤 Hofmann Corris Mabelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:23
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE19527E
Cited
US1914427A
Cited
US1929328A
Cited
US2025582A
Cited
US2013723A
Cited
US2154186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |