US2604168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frostproof deep well pump arrangement
Assignee: Individual
•
Filing: 1947-02-13
•
Granted: 1952-07-22
•
Expires: 1967-02-13
Abstract
No abstract record available.
Inventors
- 👤 Paul M Van Ackeren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:21
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US568817A
Cited
US1656550A
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US1693405A
Cited
US1748589A
Cited
US1918756A
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US2025317A
Cited
US2309697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |