US2435326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump
Assignee: DUFF NORTON Manufacturing Co
•
Filing: 1945-03-02
•
Granted: 1948-02-03
•
Expires: 1965-03-02
Abstract
No abstract record available.
Inventors
- 👤 Frank H Schwerin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:26
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42; F; F04; F04B; F04B49/00; F04B49/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1047007A
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US1969920A
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US2091876A
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US2250551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-02 | 1951-08-04 | 1952-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-02 | 1955-08-04 | 1956-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-02 | 1959-08-04 | 1960-02-03 | $7700.00 | Window Closed / Lapsed |