Patent US2827450A successfully refreshed from Google Patents.
US2827450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-aminothiophene azo compounds
Assignee: Eastman Kodak Co
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Filing: 1955-08-12
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Granted: 1958-03-18
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Expires: 1975-08-12
Abstract
No abstract record available.
Inventors
- 👤 Edmund B Towne
- 👤 William H Moore
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:40
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/30; C07D333/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE AZO COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
6 words
THE AZO COMPOUNDS HAVING THE 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) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |