US2852715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency structure
Assignee: Unisys Corp
•
Filing: 1953-03-24
•
Granted: 1958-09-16
•
Expires: 1973-03-24
Abstract
No abstract record available.
Inventors
- 👤 Charles E Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:50
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J25/00; H01J25/02; H01J25/10; H01J25/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2304186A
Cited
US2305884A
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US2403782A
Cited
US2394396A
Cited
US2512887A
Cited
US2410109A
Cited
US2564743A
Cited
US2664908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |