US2497606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfilm viewer and projecting apparatus with masking and selecting means
Assignee: Herbert D Adler & Co
•
Filing: 1945-10-18
•
Granted: 1950-02-14
•
Expires: 1965-10-18
Abstract
No abstract record available.
Inventors
- 👤 Alvin G Herrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:42
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)
US2379534A
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US1133311A
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US1218979A
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US1646855A
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US1889575A
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US1900651A
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US2265859A
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US2285644A
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US2323372A
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US2357593A
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US2369284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |