Patent US846642A successfully refreshed from Google Patents.
US846642A
Expired / Lapsed
US
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Process of reducing metallic sulfids.
Assignee: CHALON G CLOUD
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Filing: 1905-12-26
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Granted: 1907-03-12
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Expires: 1925-12-26
Abstract
No abstract record available.
Inventors
- 👤 Edward L Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:20
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/12
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) | 1910-03-11 | 1910-09-10 | 1911-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-03-11 | 1914-09-10 | 1915-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-03-11 | 1918-09-10 | 1919-03-12 | $7700.00 | Window Closed / Lapsed |