US2857805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture theater system
Assignee: American Optical Corp
•
Filing: 1953-04-06
•
Granted: 1958-10-28
•
Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 O'brien Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:18
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1330447A
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US1482503A
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US2037017A
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US2157138A
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US2280206A
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US2273074A
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US2299682A
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US2542789A
Cited
US2476521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |