US2929918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell inspection lights
Assignee: Individual
•
Filing: 1957-09-30
•
Granted: 1960-03-22
•
Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 William W Wittie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:32
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; G02B7/182; F; F21; F21L; F21L14/00; F21V; F21V17/00; F21V17/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1036000A
Cited
US1493709A
Cited
US1874571A
Cited
US2079233A
Cited
US2226616A
Cited
US2289226A
Cited
US2740882A
Cited
US2677751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |