US2492971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P-nitro-o-methyl sulfonebenzene azo-n-beta-cyanoethyl-n-hydroxyalkylaniline dye compounds
Assignee: Eastman Kodak Co
•
Filing: 1946-07-26
•
Granted: 1950-01-03
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Expires: 1966-07-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:59
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
THE AZO DYE COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
THE AZO DYE COMPOUNDS HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2109024A
Cited
DE640404C
Cited
US2156446A
Cited
US2082156A
Cited
CH188205A
Cited
US2173053A
Cited
US2387987A
Cited
CH216157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |