US2543633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: Hanna Coal and Ore Corp
•
Filing: 1945-12-06
•
Granted: 1951-02-27
•
Expires: 1965-12-06
Abstract
No abstract record available.
Inventors
- 👤 Lamphere Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:01
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2211; Y; Y10; Y10S; Y10S415/00; Y10S415/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US513057A
Cited
US616576A
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US782343A
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US1650873A
Cited
US2076586A
Cited
US2143032A
Cited
US2130940A
Cited
US2266180A
Cited
US2247813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |