Patent US1409548A successfully refreshed from Google Patents.
US1409548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: Individual
•
Filing: 1920-10-20
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Granted: 1922-03-14
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Expires: 1940-10-20
Abstract
No abstract record available.
Inventors
- 👤 Imhoff Floyd Nelson
- 👤 Hutchinson Joseph
- 👤 Hamilton Clifford Coates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:02
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3446
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) | 1925-03-13 | 1925-09-12 | 1926-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-03-13 | 1929-09-12 | 1930-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-03-13 | 1933-09-12 | 1934-03-14 | $7700.00 | Window Closed / Lapsed |