US2944187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube apparatus
Assignee: Varian Medical Systems Inc
•
Filing: 1955-06-14
•
Granted: 1960-07-05
•
Expires: 1975-06-14
Abstract
No abstract record available.
Inventors
- 👤 Richard L Walter
- 👤 James C Filmer
- 👤 Norman P Hiestand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:58
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06; H01J; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |