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 05:49
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/16; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2427084A
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US2485133A
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US2647985A
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US2691720A
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US2744190A
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FR1044320A
Cited
US2745001A
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FR1125945A
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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 |