US2668228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp structure
Assignee: LEVINSON Manufacturing CO Inc
•
Filing: 1949-08-26
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Granted: 1954-02-02
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Expires: 1969-08-26
Abstract
No abstract record available.
Inventors
- 👤 Benjamin L Levinson
- 👤 Korshin Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:46
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/0075; F21L; F21L4/00; F21L4/08; F21L4/085; F21S; F21S6/00; F21S6/002; F21S9/00; F21S9/02; F21V21/00; F21V21/02; F21V21/08; F21V21/088; F21V21/0885; F21V21/14; F21V21/30; F21V7/0008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US723836A
Cited
US728789A
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FR462458A
Cited
US1755385A
Cited
US1922079A
Cited
US2133494A
Cited
US2389762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |