Patent US2333384A successfully refreshed from Google Patents.
US2333384A
Expired / Lapsed
US
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Arylaminoanthraquinone compound
Assignee: EIDP Inc
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Filing: 1941-09-25
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Granted: 1943-11-02
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Expires: 1961-09-25
Abstract
No abstract record available.
Inventors
- 👤 David X Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:40
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/514; C09B1/5145
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) | 1946-11-01 | 1947-05-03 | 1947-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-01 | 1951-05-03 | 1951-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-01 | 1955-05-03 | 1955-11-02 | $7700.00 | Window Closed / Lapsed |