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US2440966A
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Ventilation system for motionpicture projectors
Assignee: De Jur AMSCO Corp
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Filing: 1946-10-17
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Granted: 1948-05-04
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Expires: 1966-10-17
Abstract
No abstract record available.
Inventors
- 👤 Lewis H Moomaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:05
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR510255A
Cited
US1587955A
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US1891683A
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GB379175A
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US1921214A
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US1944029A
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US2135500A
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US2186618A
Cited
US2194585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-04 | 1951-11-03 | 1952-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-04 | 1955-11-03 | 1956-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-04 | 1959-11-03 | 1960-05-04 | $7700.00 | Window Closed / Lapsed |