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US2434765A
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US
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1-amino-2-hydroxyalkylthio-4-arylamino-anthraquinones
Assignee: BASF Schweiz AG
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Filing: 1945-03-08
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Granted: 1948-01-20
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Expires: 1965-03-08
Abstract
No abstract record available.
Inventors
- 👤 Grossmann Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:01
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/56; C09B1/58; C09B1/60; C09B1/16; C09B1/20; C09B1/26; C09B1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-19 | 1951-07-21 | 1952-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-19 | 1955-07-21 | 1956-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-19 | 1959-07-21 | 1960-01-20 | $7700.00 | Window Closed / Lapsed |