Patent US2879397A successfully refreshed from Google Patents.
Patent US2240307A successfully refreshed from Google Patents.
US2240307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump
Assignee: Individual
•
Filing: 1938-07-01
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Granted: 1941-04-29
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Expires: 1958-07-01
Abstract
No abstract record available.
Inventors
- 👤 List Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:53
CPC Classifications
F; F04; F04B; F04B45/00; F04B45/04; F04B45/047; F04F; F04F5/00; F04F5/14; F04F5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-04-28 | 1944-10-28 | 1945-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-28 | 1948-10-28 | 1949-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-28 | 1952-10-28 | 1953-04-29 | $7700.00 | Window Closed / Lapsed |