Patent US4622384A successfully refreshed from Google Patents.
Patent US2652848A successfully refreshed from Google Patents.
US2652848A
Expired / Lapsed
US
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Hydraulic control for oil burner fuel supply valves
Assignee: Individual
•
Filing: 1949-03-16
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Granted: 1953-09-22
•
Expires: 1969-03-16
Abstract
No abstract record available.
Inventors
- 👤 Wick Robert Maphis
- 👤 Kern George Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:11
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/01; F16K47/012; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2562
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US803189A
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US1383432A
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US2543010A
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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) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |