Patent US421218A successfully refreshed from Google Patents.
US421218A
Expired / Lapsed
US
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Combismed boring-tool
Assignee: —
•
Filing: —
•
Granted: 1890-02-11
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Expires: 1907-02-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/109; B23B51/108; B23B31/00; B23B31/005; B23B31/02; B23B31/10; B23B31/107; B23B31/1075; B23B31/1076; B23B51/009; B23B2251/00; B23B2251/60; B23B2251/603; B23B2251/606; Y; Y10; Y10T; Y10T408/00; Y10T408/86; Y10T408/87; Y10T408/8725; Y10T408/8734
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) | 1893-02-10 | 1893-08-12 | 1894-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-02-10 | 1897-08-12 | 1898-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-02-11 | 1901-08-13 | 1902-02-12 | $7700.00 | Window Closed / Lapsed |