Patent US2857523A successfully refreshed from Google Patents.
US2857523A
Expired / Lapsed
US
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Fluoroscopic device
Assignee: Individual
•
Filing: 1955-06-16
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Granted: 1958-10-21
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Expires: 1975-06-16
Abstract
No abstract record available.
Inventors
- 👤 Corso Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:56
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/023; G02B23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2705758A
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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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |