US2420014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode
Assignee: Varian Medical Systems Inc
•
Filing: 1944-04-18
•
Granted: 1947-05-06
•
Expires: 1964-04-18
Abstract
No abstract record available.
Inventors
- 👤 George T Rayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:11
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1917991A
Cited
US1663547A
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US1695819A
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US1894059A
Cited
US1948445A
Cited
US1957486A
Cited
US1961122A
Cited
US2107945A
Cited
US2175345A
Cited
US2091554A
Cited
US2140534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |