US2589437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating device for motionpicture projecting or viewing apparatus
Assignee: Individual
•
Filing: 1948-07-06
•
Granted: 1952-03-18
•
Expires: 1968-07-06
Abstract
No abstract record available.
Inventors
- 👤 Jr George Sabol
- 👤 Sabol Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:14
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/20; G03B21/2006; G03B21/2013; G03B21/2026; G03B21/2053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1911584A
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US2012236A
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US1079343A
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US900733A
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US1231494A
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US1957404A
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US1983402A
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US2148007A
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US2262051A
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US2358810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |