US2628963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,4-diamino-2,3-anthraquinone-dicarboximides
Assignee: EIDP Inc
•
Filing: 1951-12-05
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Granted: 1953-02-17
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Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Laucius
- 👤 Stanley B Speck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:39
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B5/2409; C09B5/2436; C09B5/2445; C09B5/2454; C09B5/2463; C09B5/2472; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
1,4-DIAMINO-2,3 ANTHRAQUINONE-DICARBOXIMIDES OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
1,4-DIAMINO-2,3 ANTHRAQUINONE-DICARBOXIMIDES OF THE GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |