US743668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extracting chromium from chrome-iron ore.
Assignee: FIRM OF CHEMISCHE FABRIK GRIESHEIM ELECTRON
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Filing: 1903-02-06
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Granted: 1903-11-10
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Expires: 1923-02-06
Abstract
No abstract record available.
Inventors
- 👤 Robert Suchy
- 👤 Heinrich Specketer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:54
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01
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) | 1906-11-09 | 1907-05-11 | 1907-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-11-09 | 1911-05-11 | 1911-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-11-09 | 1915-05-11 | 1915-11-10 | $7700.00 | Window Closed / Lapsed |