US1902084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid dyestuffs of the anthraquinone series
Assignee: General Aniline Works Inc
•
Filing: 1931-03-06
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Granted: 1933-03-21
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Expires: 1951-03-06
Abstract
No abstract record available.
Inventors
- 👤 Kraenzlein Georg
- 👤 Diefenbach Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:47
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/22; C09B1/32; C09B1/34; C09B1/343; C09B1/50; C09B1/54; C09B1/545
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) | 1936-03-20 | 1936-09-19 | 1937-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-03-20 | 1940-09-19 | 1941-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-03-20 | 1944-09-19 | 1945-03-21 | $7700.00 | Window Closed / Lapsed |