US1736088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1.4-diamino-2-alkoxy-anthraquinone
Assignee: General Aniline Works Inc
•
Filing: 1927-04-20
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Granted: 1929-11-19
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Expires: 1947-04-20
Abstract
No abstract record available.
Inventors
- 👤 Nawiasky Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:05
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/545; C09B1/16; C09B1/20; C09B1/22; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 0
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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) | 1932-11-18 | 1933-05-20 | 1933-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-11-18 | 1937-05-20 | 1937-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-11-18 | 1941-05-20 | 1941-11-19 | $7700.00 | Window Closed / Lapsed |