Patent US2494058A successfully refreshed from Google Patents.
US2494058A
Expired / Lapsed
US
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Lighting unit
Assignee: Ritter Co Inc
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Filing: 1946-08-01
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Granted: 1950-01-10
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Expires: 1966-08-01
Abstract
No abstract record available.
Inventors
- 👤 Edward J Ries
- 👤 Clarence G Maxson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
F; F21; F21V; F21V9/00; F21V9/04; F21W; F21W2131/00; F21W2131/20; F21W2131/202; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33; F21Y2113/00; F21Y2113/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |