US2364675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color forming compounds containing sulphonamide groups
Assignee: Eastman Kodak Co
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Filing: 1941-07-26
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Granted: 1944-12-12
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Expires: 1961-07-26
Abstract
No abstract record available.
Inventors
- 👤 Paul W Vittum
- 👤 Willard D Peterson
- 👤 Henry D Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/344; G03C7/3212; G03C7/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-12-12 | 1948-06-12 | 1948-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-12-12 | 1952-06-12 | 1952-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-12-12 | 1956-06-12 | 1956-12-12 | $7700.00 | Window Closed / Lapsed |