US2619611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube apparatus
Assignee: Varian Medical Systems Inc
•
Filing: 1951-05-29
•
Granted: 1952-11-25
•
Expires: 1971-05-29
Abstract
No abstract record available.
Inventors
- 👤 Robert L Norton
- 👤 John J Woerner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:37
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1615023A
Cited
US2364732A
Cited
US2305884A
Cited
US2293152A
Cited
US2281717A
Cited
US2403025A
Cited
US2469843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |