US2640160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure monitor for horizontal cassette changer
Assignee: Westinghouse Electric Corp
•
Filing: 1950-11-21
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Granted: 1953-05-26
•
Expires: 1970-11-21
Abstract
No abstract record available.
Inventors
- 👤 Zane L Collins
- 👤 Jr Frederick J Euler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:33
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/26; H05G1/30; H05G1/38; H05G1/42; H05G1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2401288A
Cited
US2401289A
Cited
US2486866A
Cited
US2488315A
Cited
US2583132A
Cited
US2550610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |