Patent US3902189A successfully refreshed from Google Patents.
Patent US237912A successfully refreshed from Google Patents.
US237912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Half to feedeeick l
Assignee: —
•
Filing: —
•
Granted: 1881-02-15
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Expires: 1898-02-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:07
CPC Classifications
B; B23; B23D; B23D49/00; B23D49/007; Y; Y10; Y10T; Y10T83/00; Y10T83/687; Y10T83/6875; Y10T83/869; Y10T83/8696; Y10T83/8789; Y10T83/929; Y10T83/9454
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) | 1884-02-15 | 1884-08-16 | 1885-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1888-02-15 | 1888-08-16 | 1889-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1892-02-15 | 1892-08-16 | 1893-02-15 | $7700.00 | Window Closed / Lapsed |