Patent US3031970A successfully refreshed from Google Patents.
US3031970A
Expired / Lapsed
US
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Magnetic ram pump
Assignee: Individual
•
Filing: 1960-11-15
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Granted: 1962-05-01
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Expires: 1980-11-15
Abstract
No abstract record available.
Inventors
- 👤 Hoblitzelle Karl St John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:14
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/042; F04B47/00; F04B47/06; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/126; F04B7/00; F04B7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US828326A
Cited
US1396494A
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US1643616A
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US1655825A
Cited
US1704179A
Cited
US1840994A
Cited
US2604049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |