Patent US2039898A successfully refreshed from Google Patents.
US2039898A
Expired / Lapsed
US
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Azo-dyestuffs for dyeing leather
Assignee: FIRM OF SOCIETY OF CHEMICAL INDUSTRY IN BASLE
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Filing: 1935-01-15
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Granted: 1936-05-05
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Expires: 1955-01-15
Abstract
No abstract record available.
Inventors
- 👤 Gyr Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:32
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/38; C09B35/40
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) | 1939-05-05 | 1939-11-04 | 1940-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-05 | 1943-11-04 | 1944-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-05 | 1947-11-04 | 1948-05-05 | $7700.00 | Window Closed / Lapsed |