US23313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved amalgamator
Assignee: —
•
Filing: —
•
Granted: 1859-03-22
•
Expires: 1876-03-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:39
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/10
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) | 1862-03-21 | 1862-09-20 | 1863-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1866-03-21 | 1866-09-20 | 1867-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1870-03-21 | 1870-09-20 | 1871-03-22 | $7700.00 | Window Closed / Lapsed |