US2596660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrodiphenylamine phosphorus dye compounds
Assignee: Eastman Kodak Co
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Filing: 1950-06-03
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Granted: 1952-05-13
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Expires: 1970-06-03
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/44; C07F9/4403; C07F9/4419; C07F9/3804; C07F9/3834; C07F9/40; C07F9/4003; C07F9/4021; C07F9/42; C07F9/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE DIPHENYLAMINE COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
THE DIPHENYLAMINE COMPOUNDS HAVING THE GENERAL FORMULA:
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |