US2444302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hearing aid
Assignee: E A Myers & Sons
•
Filing: 1943-03-16
•
Granted: 1948-06-29
•
Expires: 1963-03-16
Abstract
No abstract record available.
Inventors
- 👤 Samuel F Lybarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:11
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1688976A
Cited
US2122429A
Cited
US2251928A
Cited
US2319627A
Cited
US2302113A
Cited
US2321370A
Cited
US2386705A
Cited
US2327321A
Cited
US2327320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |