Patent US2647121A successfully refreshed from Google Patents.
US2647121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamine-bis-acetamides
Assignee: NAT ALLUMINATE CORP
•
Filing: 1951-02-02
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Granted: 1953-07-28
•
Expires: 1971-02-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:27
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/145
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
9 words
A WATER INSOLUBLE COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 2
Dependent Claim
9 words
A WATER INSOLUBLE COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 3
Dependent Claim
7 words
THE COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 4
Dependent Claim
7 words
THE COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA
References Cited (Backward Citations)
US2087565A
Cited
US2191978A
Cited
US2168253A
Cited
US2388154A
Cited
US2420122A
Cited
US2480439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |