US29474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in manufacture of oxide of manganese
Assignee: —
•
Filing: —
•
Granted: 1860-08-07
•
Expires: 1877-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:30
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/02; C01P; C01P2006/00; C01P2006/40; Y; Y10; Y10S; Y10S436/00; Y10S436/804; Y10S436/815; Y10S436/817; Y10S436/818
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) | 1863-08-07 | 1864-02-06 | 1864-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1867-08-07 | 1868-02-06 | 1868-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1871-08-07 | 1872-02-06 | 1872-08-07 | $7700.00 | Window Closed / Lapsed |