US2856587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced modulator
Assignee: WESLEY R SCHUM
•
Filing: 1953-07-30
•
Granted: 1958-10-14
•
Expires: 1973-07-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph B Batchelor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:31
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/56; H03C1/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1773116A
Cited
US2248250A
Cited
US2358520A
Cited
US2504050A
Cited
US2545788A
Cited
US2654058A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |