US2749433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-proof lighting fixture
Assignee: Individual
•
Filing: 1950-07-22
•
Granted: 1956-06-05
•
Expires: 1970-07-22
Abstract
No abstract record available.
Inventors
- 👤 Arthur I Appleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:53
CPC Classifications
F; F21; F21V; F21V31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1787032A
Cited
FR640250A
Cited
US1943852A
Cited
US2041425A
Cited
US2094394A
Cited
US2304085A
Cited
US2332362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |