Patent US3048659A successfully refreshed from Google Patents.
US3048659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone preamplifier
Assignee: Motorola Solutions Inc
•
Filing: 1959-03-30
•
Granted: 1962-08-07
•
Expires: 1979-03-30
Abstract
No abstract record available.
Inventors
- 👤 Robert P Crow
- 👤 Gilbert J Vollink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:28
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE862917C
Cited
US2774826A
Cited
US2762870A
Cited
US2929877A
Cited
US2784262A
Cited
US2842623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |