US2606497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil burner pumping unit
Assignee: Eureka Williams Co
•
Filing: 1951-10-04
•
Granted: 1952-08-12
•
Expires: 1971-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert R Witherell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:54
CPC Classifications
F; F23; F23K; F23K5/00; F23K5/02; F23K5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1878736A
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US1868161A
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US1986003A
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US2312886A
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US2412383A
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US2383092A
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US2413035A
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US2495685A
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US2538982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |