US2546190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing and light diffuser for fluorescent fixtures
Assignee: Individual
•
Filing: 1946-06-21
•
Granted: 1951-03-27
•
Expires: 1966-06-21
Abstract
No abstract record available.
Inventors
- 👤 Earl T Koppang
- 👤 Kintzinger Henry Wing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:44
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21S8/06; F21V; F21V17/00; F21V17/007; F21V11/00; F21V11/06; F21Y; F21Y2103/00; Y; Y02; Y02B; Y02B20/00; Y02B20/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2139005A
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US2250954A
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US2281379A
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US2331774A
Cited
US2319572A
Cited
US2327552A
Cited
US2411952A
Cited
US2427084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |