US42994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in
Assignee: —
•
Filing: —
•
Granted: 1864-05-31
•
Expires: 1881-05-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:24
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/02; E05B65/025; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/1039; Y10T292/1041; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5097; Y10T70/5111; Y10T70/5155; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5345; Y10T70/535; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791
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) | 1867-05-31 | 1867-11-30 | 1868-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1871-05-31 | 1871-11-30 | 1872-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1875-05-31 | 1875-11-30 | 1876-05-31 | $7700.00 | Window Closed / Lapsed |