US2543713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp fixture
Assignee: Individual
•
Filing: 1947-02-13
•
Granted: 1951-02-27
•
Expires: 1967-02-13
Abstract
No abstract record available.
Inventors
- 👤 William C Yeager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21S8/06; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335218A
Cited
US2360448A
Cited
US2357057A
Cited
US2406104A
Cited
US2430336A
Cited
US2420943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |