US2958797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable cooler for electron tubes
Assignee: Varian Medical Systems Inc
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Filing: 1959-04-24
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Granted: 1960-11-01
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Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 Yosuke M Mizuhara
- 👤 Martin E Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:35
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/027; H01J23/033; H01J19/00; H01J19/28; H01J19/32; H01J19/36; H01J19/74; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1917703A
Cited
US2045659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |