US2839672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel lighting fixture
Assignee: Sunbeam Lighting Co
•
Filing: 1957-07-29
•
Granted: 1958-06-17
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Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Bobrick Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:52
CPC Classifications
F; F21; F21V; F21V27/00; F21S; F21S4/00; F21S4/20; F21S8/00; F21S8/03; F21S8/033; F21S8/037; F21V15/00; F21V15/01; F21V15/013; F21V17/00; F21V17/10; F21V17/107; F21V21/00; F21V21/005; F21V21/02; F21V21/025; F21V31/00; F21W; F21W2131/00; F21W2131/10; F21W2131/101; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335545A
Cited
US2336414A
Cited
US2578190A
Cited
US2533661A
Cited
GB635881A
Cited
US2717954A
Cited
US2717307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |