US2473403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic dye intermediates
Assignee: EIDP Inc
•
Filing: 1945-02-08
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Granted: 1949-06-14
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Expires: 1965-02-08
Abstract
No abstract record available.
Inventors
- 👤 Woodward David Willcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:33
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/0056; D06P1/006; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/327; G03C7/3275; Y; Y10; Y10S; Y10S534/00; Y10S534/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |