Patent US2993115A successfully refreshed from Google Patents.
US2993115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light diffuser for fluorescent lighting fixture
Assignee: Individual
•
Filing: 1957-09-06
•
Granted: 1961-07-18
•
Expires: 1977-09-06
Abstract
No abstract record available.
Inventors
- 👤 Maurice C Rosenblatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:12
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/16; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2146182A
Cited
US2299276A
Cited
US2427084A
Cited
US2485133A
Cited
US2647985A
Cited
US2691720A
Cited
US2643328A
Cited
US2744190A
Cited
FR1044320A
Cited
US2745001A
Cited
FR1125945A
Cited
US2817752A
Cited
US2854565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |