Patent US632162A successfully refreshed from Google Patents.
Patent US23598A successfully refreshed from Google Patents.
US23598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw-propeller
Assignee: —
•
Filing: —
•
Granted: 1859-04-12
•
Expires: 1876-04-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/325; F04D29/326; B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1862-04-11 | 1862-10-11 | 1863-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1866-04-11 | 1866-10-11 | 1867-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1870-04-11 | 1870-10-11 | 1871-04-12 | $7700.00 | Window Closed / Lapsed |