US2667571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug-in lighting unit for dual power supply systems
Assignee: Kurt Versen Co
•
Filing: 1949-09-30
•
Granted: 1954-01-26
•
Expires: 1969-09-30
Abstract
No abstract record available.
Inventors
- 👤 Versen Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/002; F21S; F21S8/00; F21S8/03; F21S8/033; H; H01; H01R; H01R31/00; F21V21/14; F21V21/30; H01R31/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE22037E
Cited
US1631997A
Cited
US1791264A
Cited
US1738206A
Cited
GB412077A
Cited
US2063099A
Cited
US2201743A
Cited
US2227549A
Cited
US2397688A
Cited
US2428110A
Cited
US2433917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |