US2170262A
Expired / Lapsed
US
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Derivatives of dyestuffs containing hydroxyl groups and process of making same
Assignee: SOC OF CHEMICAL IND
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Filing: 1936-07-23
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Granted: 1939-08-22
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Expires: 1956-07-23
Abstract
No abstract record available.
Inventors
- 👤 Graenacher Charles
- 👤 Bruengger Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:41
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B5/44; C09B5/46; C09B5/48; C09B5/56; C09B1/00; C09B1/02; C09B1/06; C09B1/50; C09B3/00; C09B3/22; C09B3/30; C09B43/00; C09B43/18
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) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |