US2498720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency protective circuits
Assignee: Raytheon Co
•
Filing: 1947-02-06
•
Granted: 1950-02-28
•
Expires: 1967-02-06
Abstract
No abstract record available.
Inventors
- 👤 Norman R Wild
- 👤 Huston W Cockrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:25
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/66; H05B6/666; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/548
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1180075A
Cited
US1779259A
Cited
US1913588A
Cited
US2165848A
Cited
US2262932A
Cited
US2304015A
Cited
US2366660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |