US2680805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louverall lighting device
Assignee: Individual
•
Filing: 1949-07-26
•
Granted: 1954-06-08
•
Expires: 1969-07-26
Abstract
No abstract record available.
Inventors
- 👤 Macdonald Angus Snead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:31
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/02; E; E04; E04B; E04B5/00; E04B5/02; E04B5/10; F21V; F21V17/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309449A
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FR745369A
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US2511764A
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US1587434A
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US2139005A
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US2306597A
Cited
GB537898A
Cited
US2364992A
Cited
US2427084A
Cited
US2466223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |