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Patent US857046A successfully refreshed from Google Patents.
US857046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing concentrated formic acid from formates.
Assignee: Chemische Fabrik Gruenau Landshoff & Meyer AG Manufacturing Chemists
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Filing: 1906-06-27
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Granted: 1907-06-18
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Expires: 1926-06-27
Abstract
No abstract record available.
Inventors
- 👤 Emil Franke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:10
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10
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) | 1910-06-17 | 1910-12-17 | 1911-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-06-17 | 1914-12-17 | 1915-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-06-17 | 1918-12-17 | 1919-06-18 | $7700.00 | Window Closed / Lapsed |