US2630106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preheating device for starting internal-combustion engines
Assignee: Wm Bros Boiler & Manufacturing Co
•
Filing: 1950-06-26
•
Granted: 1953-03-03
•
Expires: 1970-06-26
Abstract
No abstract record available.
Inventors
- 👤 Robert L Butts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:28
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316021A
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US2224544A
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US1015145A
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US1199115A
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US1637596A
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US1236416A
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US1460668A
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US1769994A
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US2399942A
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US2399941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |