US2795577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo compounds
Assignee: Althouse Chemical Co
•
Filing: 1956-07-06
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Granted: 1957-06-11
•
Expires: 1976-07-06
Abstract
No abstract record available.
Inventors
- 👤 James F Feeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:48
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C07; C07D; C07D249/00; C07D249/16; C07D249/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A DISAZO COMPOUND HAVING THE FOLLOWING STRUCTURE
Claim 2
Dependent Claim
7 words
A DISAZO COMPOUND HAVING THE FOLLOWING STRUCTURE
References Cited (Backward Citations)
US820052A
Cited
US2004250A
Cited
CH183453A
Cited
US2270478A
Cited
US2385862A
Cited
US2467262A
Cited
US2673198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |