US2641687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lighting fixture having air-cooled lamp and ballast chamber
Assignee: GUARDIAN EXP PACKERS CORP
•
Filing: 1950-02-23
•
Granted: 1953-06-09
•
Expires: 1970-02-23
Abstract
No abstract record available.
Inventors
- 👤 William S Akely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:58
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21V29/83; F21S; F21S8/00; F21S8/08; F21S8/081; F21V15/00; F21V15/01; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |