US2789246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency apparatus
Assignee: Unisys Corp
•
Filing: 1950-11-25
•
Granted: 1957-04-16
•
Expires: 1970-11-25
Abstract
No abstract record available.
Inventors
- 👤 Chao C Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:21
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/42; H01J23/02; H01J23/08; H01J23/083; H03; H03K; H03K3/00; H03K3/78
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |