Patent US2473736A successfully refreshed from Google Patents.
US2473736A
Expired / Lapsed
US
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Microfilm reader and projecting apparatus
Assignee: Individual
•
Filing: 1946-05-22
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Granted: 1949-06-21
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Expires: 1966-05-22
Abstract
No abstract record available.
Inventors
- 👤 Stern Nathan Saliy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:44
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/111
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2332810A
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US1428347A
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US1447403A
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US1889575A
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US2022903A
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US2113578A
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US2125582A
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US2195425A
Cited
US2293207A
Cited
US2279463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |