US2939922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional microphone having a low susceptibility to shock and wind
Assignee: Individual
•
Filing: 1956-05-22
•
Granted: 1960-06-07
•
Expires: 1976-05-22
Abstract
No abstract record available.
Inventors
- 👤 Gorike Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:47
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932581A
Cited
US2210415A
Cited
US2228886A
Cited
US2225312A
Cited
US2299342A
Cited
US2301638A
Cited
US2401328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |