US2568090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced mixer
Assignee: Raytheon Co
•
Filing: 1948-06-22
•
Granted: 1951-09-18
•
Expires: 1968-06-22
Abstract
No abstract record available.
Inventors
- 👤 Henry J Riblet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:52
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H03; H03D; H03D7/00; H03D7/14; H03D7/1408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2059601A
Cited
US2382693A
Cited
US2410387A
Cited
US2462893A
Cited
US2468166A
Cited
US2468237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |