Patent US81814A successfully refreshed from Google Patents.
US81814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved wiie-ooolee
Assignee: —
•
Filing: —
•
Granted: 1868-09-01
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Expires: 1885-09-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:07
CPC Classifications
F; F25; F25D; F25D31/00; F25D31/006; F25D31/007; F25D2303/00; F25D2303/08; F25D2303/081; F25D2331/00; F25D2331/80; F25D2331/803; F25D2331/809; F25D3/00; F25D3/02; F25D3/06; F25D3/08; Y; Y10; Y10T; Y10T225/00; Y10T225/20; Y10T225/238; Y10T225/239
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) | 1871-09-01 | 1872-03-02 | 1872-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1875-09-01 | 1876-03-02 | 1876-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1879-09-01 | 1880-03-02 | 1880-09-01 | $7700.00 | Window Closed / Lapsed |