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US2486440A
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US
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Production of phenazonium dyestuff images
Assignee: GAF Chemicals Corp
•
Filing: 1946-01-10
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Granted: 1949-11-01
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Expires: 1966-01-10
Abstract
No abstract record available.
Inventors
- 👤 Willy A Schmidt
- 👤 Tulagin Vaevolod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:25
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1782356A
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US1886809A
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US1880572A
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US2163166A
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US2196739A
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US2193015A
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US2304953A
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US2350109A
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US2364350A
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US2400872A
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US2414491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-31 | 1953-05-02 | 1953-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-31 | 1957-05-02 | 1957-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-31 | 1961-05-02 | 1961-11-01 | $7700.00 | Window Closed / Lapsed |