US2591696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency electron tube structure
Assignee: Unisys Corp
•
Filing: 1946-10-30
•
Granted: 1952-04-08
•
Expires: 1966-10-30
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:33
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/06; H03B19/08; H03B19/10; H01; H01J; H01J25/00; H01J25/02; H01J25/22; H01J25/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2114114A
Cited
US2222899A
Cited
US2239905A
Cited
US2220922A
Cited
US2280824A
Cited
US2253503A
Cited
US2253589A
Cited
US2350907A
Cited
US2289220A
Cited
US2305883A
Cited
US2397411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |