Patent US2615778A successfully refreshed from Google Patents.
US2615778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for multiple recording on film
Assignee: Pennsylvania Research Corp
•
Filing: 1948-07-16
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Granted: 1952-10-28
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Expires: 1968-07-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur N Butz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:39
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2102695A
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US2196166A
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US2269414A
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US2293349A
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US2267356A
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US2358327A
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US2546540A
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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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |