Patent US2564285A successfully refreshed from Google Patents.
US2564285A
Expired / Lapsed
US
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Pneumatic-hydraulic system for operating well pumping equipment
Assignee: Individual
•
Filing: 1948-03-11
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Granted: 1951-08-14
•
Expires: 1968-03-11
Abstract
No abstract record available.
Inventors
- 👤 Samuel V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:11
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |