Patent US2049268A successfully refreshed from Google Patents.
US2862069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic transducer
Assignee: Roanwell Corp
•
Filing: 1956-02-28
•
Granted: 1958-11-25
•
Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 Gaston A Marchand
- 👤 Donald W Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:47
CPC Classifications
H; H04; H04R; H04R9/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1852594A
Cited
US1964606A
Cited
US2084945A
Cited
US2293078A
Cited
DE902015C
Cited
US2498825A
Cited
GB617906A
Cited
US2551949A
Cited
US2604551A
Cited
US2517727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |