US2684635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump
Assignee: HARVEY E WINKELMAN
•
Filing: 1949-03-09
•
Granted: 1954-07-27
•
Expires: 1969-03-09
Abstract
No abstract record available.
Inventors
- 👤 Harvey E Winkelman
- 👤 Jr Harvey E Winkelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:34
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |