US2449713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for portable motionpicture projectors
Assignee: Helene Curtis Industries Inc
•
Filing: 1945-06-14
•
Granted: 1948-09-21
•
Expires: 1965-06-14
Abstract
No abstract record available.
Inventors
- 👤 Otto R Nemeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:15
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1160764A
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US1287576A
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US1814269A
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US1966531A
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US1971454A
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US2269794A
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US2292966A
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US2344263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |