US2641327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic ear pendant
Assignee: SoundScriber Corp
•
Filing: 1950-10-13
•
Granted: 1953-06-09
•
Expires: 1970-10-13
Abstract
No abstract record available.
Inventors
- 👤 Donald F Balmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:03
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/105; H04R1/1016; H04R1/20; H04R1/32; H04R1/34; H04R1/345
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US526902A
Cited
US989714A
Cited
US1847607A
Cited
US1143791A
Cited
US1556775A
Cited
US1884638A
Cited
US2545731A
Cited
US2474135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |