Patent US2686280A successfully refreshed from Google Patents.
US2686280A
Expired / Lapsed
US
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Electromagnetic piston pump
Assignee: Individual
•
Filing: 1949-10-25
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Granted: 1954-08-10
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Expires: 1969-10-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Strong
- 👤 William C Trethewey
- 👤 John B Klingel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/042; H; H02; H02K; H02K33/00; H02K33/12; H02K33/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US494956A
Cited
US1647147A
Cited
US1974262A
Cited
US2182014A
Cited
US2177795A
Cited
US2443344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |