US2939945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barrel inspection light
Assignee: Crouse Hinds Co
•
Filing: 1957-04-18
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Granted: 1960-06-07
•
Expires: 1977-04-18
Abstract
No abstract record available.
Inventors
- 👤 Earl S Ryen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:35
CPC Classifications
F; F21; F21L; F21L14/00; F21L14/02; F21L14/026; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE586006C
Cited
US1958222A
Cited
US2163673A
Cited
US2228680A
Cited
US2316835A
Cited
US2574882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |