Patent US3092440A successfully refreshed from Google Patents.
US2420A
Expired / Lapsed
US
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Improvement in the method of casting statues
Assignee: —
•
Filing: —
•
Granted: 1842-01-08
•
Expires: 1859-01-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
B; B22; B22C; B22C3/00; C; C10; C10M; C10M2201/00; C10M2201/02; Y; Y10; Y10S; Y10S70/00; Y10S70/01; Y10S70/77
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) | 1845-01-07 | 1845-07-09 | 1846-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1849-01-07 | 1849-07-09 | 1850-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1853-01-07 | 1853-07-09 | 1854-01-08 | $7700.00 | Window Closed / Lapsed |