Patent US2814751A successfully refreshed from Google Patents.
US2814751A
Expired / Lapsed
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Stem structure for beam type tubes
Assignee: Varian Medical Systems Inc
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Filing: 1955-03-16
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Granted: 1957-11-26
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Expires: 1975-03-16
Abstract
No abstract record available.
Inventors
- 👤 Clayton E Murdock
- 👤 John J Woerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:34
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/027; H01J29/00; H01J29/02; H01J3/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB387275A
Cited
US2391927A
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US2599263A
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US2458693A
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US2644907A
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GB707096A
Cited
US2629066A
Cited
US2684452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |