US2647985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination fixture and louvers therefor
Assignee: Day Brite Lighting Inc
•
Filing: 1947-12-24
•
Granted: 1953-08-04
•
Expires: 1967-12-24
Abstract
No abstract record available.
Inventors
- 👤 David J Biller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:24
CPC Classifications
F; F21; F21V; F21V11/00; F21V11/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US901294A
Cited
US1324008A
Cited
GB446954A
Cited
US2134491A
Cited
US2250954A
Cited
US2282445A
Cited
US2299256A
Cited
US2313131A
Cited
US2337437A
Cited
US2358811A
Cited
US2398624A
Cited
US2429141A
Cited
US2565435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |