US2847561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent luminaire
Assignee: Westinghouse Electric Corp
•
Filing: 1954-02-15
•
Granted: 1958-08-12
•
Expires: 1974-02-15
Abstract
No abstract record available.
Inventors
- 👤 Edward C Huerkamp
- 👤 Joseph W Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:26
CPC Classifications
F; F21; F21V; F21V19/00; F21V19/0075; F21V19/008; F21V19/0085
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2288939A
Cited
US2346166A
Cited
US2487467A
Cited
US2462243A
Cited
US2596336A
Cited
US2615123A
Cited
US2624773A
Cited
US2678380A
Cited
US2702378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |