US2592208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bezel lock for electric safety lamps
Assignee: Thomas A Edison Inc
•
Filing: 1949-08-31
•
Granted: 1952-04-08
•
Expires: 1969-08-31
Abstract
No abstract record available.
Inventors
- 👤 Willson Y Stamper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:53
CPC Classifications
F; F21; F21L; F21L14/00; F21L4/00; F21V; F21V17/00; F21V17/10; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7005; Y10T403/7007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US987744A
Cited
FR424060A
Cited
GB115400A
Cited
US1224179A
Cited
US1215274A
Cited
GB206760A
Cited
US2123807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |