US2830132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid and spectacles combination
Assignee: Individual
•
Filing: 1953-03-16
•
Granted: 1958-04-08
•
Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Edward M Borg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:26
CPC Classifications
G; G02; G02C; G02C11/00; G02C11/06; H; H04; H04R; H04R25/00; H04R25/60; H04R2225/00; H04R2225/57; H04R25/603; H04R25/609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2207705A
Cited
US2613282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |