US2448853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonamido disazo dye
Assignee: Eastman Kodak Co
•
Filing: 1945-12-29
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Granted: 1948-09-07
•
Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 Charles F H Allen
- 👤 Charles V Wilson
- 👤 Gordon F Frame
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:35
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR488792A
Cited
US1878471A
Cited
US1896450A
Cited
GB475938A
Cited
GB514093A
Cited
GB514353A
Cited
GB501131A
Cited
GB502420A
Cited
US2275130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |