US2451168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well pumping system
Assignee: Individual
•
Filing: 1943-08-03
•
Granted: 1948-10-12
•
Expires: 1963-08-03
Abstract
No abstract record available.
Inventors
- 👤 Herman E Lauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:49
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1301597A
Cited
US1501951A
Cited
US1545905A
Cited
US1604644A
Cited
DE448662C
Cited
US1713848A
Cited
US1784242A
Cited
US1692131A
Cited
US2026883A
Cited
US2196668A
Cited
US2261752A
Cited
US2242166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |