US2856472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker for internal combustion engine
Assignee: Individual
•
Filing: 1955-09-07
•
Granted: 1958-10-14
•
Expires: 1975-09-07
Abstract
No abstract record available.
Inventors
- 👤 Charles N Humphries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:06
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/063; F02P7/0632
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US621263A
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US886225A
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US860383A
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GB190717463A
Cited
US958908A
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US937522A
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US1658508A
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US1997288A
Cited
US2181713A
Cited
US2257781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |