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US2180805A
Expired / Lapsed
US
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alpha-amino-anthraquinones and process of making same
Assignee: FIRM OF SOCIETY OF CHEMICAL INDUSTRY IN BASLE
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Filing: 1938-02-01
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Granted: 1939-11-21
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Expires: 1958-02-01
Abstract
No abstract record available.
Inventors
- 👤 Felix Friedrich
- 👤 Grossmann Paul
- 👤 Bommer Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:55
CPC Classifications
C; C09; C09B; C09B69/00; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B62/00; C09B62/44; C09B62/78; C09B62/80; D; D06; D06P; D06P1/00; D06P1/30; D06P1/305
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) | 1942-11-20 | 1943-05-22 | 1943-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-11-20 | 1947-05-22 | 1947-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-11-20 | 1951-05-22 | 1951-11-21 | $7700.00 | Window Closed / Lapsed |