Patent US447285A successfully refreshed from Google Patents.
US447285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
albergee
Assignee: —
•
Filing: —
•
Granted: 1891-03-03
•
Expires: 1908-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:00
CPC Classifications
F; F28; F28F; F28F27/00; F28F27/02; F28B; F28B1/00; F28B1/02; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024; F28D7/00; F28D7/16; F28D7/163; F28D7/1669; F28F2250/00; F28F2250/06
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) | 1894-03-02 | 1894-09-01 | 1895-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-03-02 | 1898-09-01 | 1899-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-03-03 | 1902-09-02 | 1903-03-04 | $7700.00 | Window Closed / Lapsed |