US2502456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high frequency discriminator and apparatus
Assignee: Unisys Corp
•
Filing: 1943-04-02
•
Granted: 1950-04-04
•
Expires: 1963-04-02
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
- 👤 Vincent R Learned
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/02; H03D9/04; H03J; H03J7/00; H03J7/02; H03J7/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2247216A
Cited
US2250532A
Cited
US2378944A
Cited
US2357313A
Cited
US2294942A
Cited
US2302834A
Cited
US2312070A
Cited
US2357314A
Cited
US2337184A
Cited
US2304377A
Cited
US2439388A
Cited
US2432093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |