US2497854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high frequency ring oscillator
Assignee: Individual
•
Filing: 1943-02-25
•
Granted: 1950-02-21
•
Expires: 1963-02-25
Abstract
No abstract record available.
Inventors
- 👤 Melvin D Baller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:32
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1934523A
Cited
US1983848A
Cited
US1929874A
Cited
US2052888A
Cited
US1941542A
Cited
US2007662A
Cited
US2109843A
Cited
US2086905A
Cited
US2067679A
Cited
US2113340A
Cited
US2081425A
Cited
US2066674A
Cited
US2177272A
Cited
US2205852A
Cited
US2175710A
Cited
US2227604A
Cited
US2203806A
Cited
US2287845A
Cited
US2252370A
Cited
US2373233A
Cited
US2292254A
Cited
US2406364A
Cited
US2298075A
Cited
US2426236A
Cited
US2431179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |