Patent US2445072A successfully refreshed from Google Patents.
US2445072A
Expired / Lapsed
US
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Mining machine headlight
Assignee: Jeffrey Manufacturing Co
•
Filing: 1944-05-13
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Granted: 1948-07-13
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Expires: 1964-05-13
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:00
CPC Classifications
F; F21; F21V; F21V25/00; F21V25/12; F21S; F21S45/00; F21S45/50; F21V15/00; F21V15/04; F21S45/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1730836A
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US1820955A
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US1948690A
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US2089049A
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US2114350A
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US2169627A
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US2219143A
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US2267707A
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US2281195A
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US2325403A
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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) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |