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US2894228A Expired / Lapsed US ⏱️ 0.0 years remaining

Radio frequency window

Assignee: Varian Medical Systems Inc
•
Filing: 1953-11-02
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Granted: 1959-07-07
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Expires: 1973-11-02
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Abstract

No abstract record available.

Inventors

  • 👤 Jr Wilson S Geisler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 06:07
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/08

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US1628438A Cited
US2734174A Cited
US2085277A Cited
US2454741A Cited
US2444303A Cited
US2478245A Cited
US2584653A Cited
US2706275A Cited
US2637776A Cited
US2555349A Cited
US2744592A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1962-07-06 1963-01-05 1963-07-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1966-07-06 1967-01-05 1967-07-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1970-07-06 1971-01-05 1971-07-07 $7700.00 Window Closed / Lapsed

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