US2529562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable earpiece for receivers
Assignee: RCA Corp
•
Filing: 1947-01-02
•
Granted: 1950-11-14
•
Expires: 1967-01-02
Abstract
No abstract record available.
Inventors
- 👤 Daniel W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:32
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US572108A
Cited
US1677185A
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US1624144A
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US1623552A
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US2337953A
Cited
US2353070A
Cited
US2430229A
Cited
US2447470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |