Patent US2852504A successfully refreshed from Google Patents.
US2852504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-amino-4-alkylsulfonyl-5-nitrothiazole azo compounds
Assignee: Eastman Kodak Co
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Filing: 1955-02-23
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Granted: 1958-09-16
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Expires: 1975-02-23
Abstract
No abstract record available.
Inventors
- 👤 Edmund B Towne
- 👤 Joseph B Dickey
- 👤 Melvin S Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE MONOAZO COMPOUNDS WHICH ARE FREE OF WATERSOLUBILIZING GROUPS AND WHICH HAVE THE FORMULA:
Claim 2
Dependent Claim
14 words
THE MONOAZO COMPOUNDS WHICH ARE FREE OF WATERSOLUBILIZING GROUPS AND WHICH HAVE THE FORMULA:
References Cited (Backward Citations)
US2149051A
Cited
US2345010A
Cited
US2619489A
Cited
US2659719A
Cited
US2709172A
Cited
US2690443A
Cited
US2708671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |