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US2620455A
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Cathode-ray oscillograph circuit
Assignee: Allen B du Mont Laboratories Inc
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Filing: 1949-02-17
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Granted: 1952-12-02
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Expires: 1969-02-17
Abstract
No abstract record available.
Inventors
- 👤 William G Fockler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:29
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2440538A
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US2522124A
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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) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |