US2479500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating means
Assignee: Individual
•
Filing: 1946-08-26
•
Granted: 1949-08-16
•
Expires: 1966-08-26
Abstract
No abstract record available.
Inventors
- 👤 Harry E Longberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:12
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/006; G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0081; G02B6/0086; G02B6/0091; G02B6/0095; G09; G09F; G09F13/00; G09F13/04; G09F13/0418; G09F13/049; G09F13/18; G09F19/00; G09F19/22; E; E04; E04F; E04F11/00; E04F11/18; E04F2011/1868; E04F2011/1872; F21W; F21W2111/00; F21W2111/08; G09F2013/184
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1164301A
Cited
US1961865A
Cited
US2082724A
Cited
FR816795A
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US2247969A
Cited
GB521781A
Cited
US2210593A
Cited
US2227861A
Cited
US2443561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |