US2967913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic intensifying ear-drum
Assignee: Individual
•
Filing: 1957-04-24
•
Granted: 1961-01-10
•
Expires: 1977-04-24
Abstract
No abstract record available.
Inventors
- 👤 Aubert Maurice
- 👤 Miquelis Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/60; H04R25/604; H04R25/606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2787670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-10 | 1964-07-11 | 1965-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-10 | 1968-07-11 | 1969-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-10 | 1972-07-11 | 1973-01-10 | $7700.00 | Window Closed / Lapsed |