Patent US2554536A successfully refreshed from Google Patents.
US2554536A
Expired / Lapsed
US
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Rotary pump
Assignee: CANDLER HILL CORP
•
Filing: 1947-03-25
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Granted: 1951-05-29
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Expires: 1967-03-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:56
CPC Classifications
F; F04; F04D; F04D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390332A
Cited
US1397273A
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DE368786C
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US2034549A
Cited
US2283844A
Cited
US2296640A
Cited
US2319776A
Cited
US2426950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |