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Patent US2564440A successfully refreshed from Google Patents.
US2564440A
Expired / Lapsed
US
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Machine for viewing and photographing documents
Assignee: MASER
•
Filing: 1949-04-28
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Granted: 1951-08-14
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Expires: 1969-04-28
Abstract
No abstract record available.
Inventors
- 👤 Herman G Maser
- 👤 Ernest P Taubes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:40
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024; G02B27/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2332810A
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US1819883A
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US1838389A
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US1834218A
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US2122710A
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US2121061A
Cited
US2168190A
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US2249228A
Cited
US2372910A
Cited
US2435099A
Cited
US2432704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |