US2583417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled socket for electron tubes
Assignee: Varian Medical Systems Inc
•
Filing: 1947-11-24
•
Granted: 1952-01-22
•
Expires: 1967-11-24
Abstract
No abstract record available.
Inventors
- 👤 William W Eitel
- 👤 Jack A Mccullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:19
CPC Classifications
H; H01; H01J; H01J7/00; H01J7/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1112861A
Cited
US1690232A
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US1829935A
Cited
US2025482A
Cited
US2045659A
Cited
US2117757A
Cited
US2176657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |