Patent US2553075A successfully refreshed from Google Patents.
US2553075A
Expired / Lapsed
US
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Still picture projection machine
Assignee: AMPRO CORP
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Filing: 1946-09-28
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Granted: 1951-05-15
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Expires: 1966-09-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Bradford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2251077A
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US2292966A
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US2285915A
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US2412551A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |