US741371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the treatment of defective hearing.
Assignee: Individual
•
Filing: 1902-05-28
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Granted: 1903-10-13
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Expires: 1922-05-28
Abstract
No abstract record available.
Inventors
- 👤 Guy C Powell
- 👤 Allen D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:53
CPC Classifications
A; A61; A61F; A61F11/00; A61H; A61H21/00; A61H23/00; A61H23/04; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/36014; A61N1/36036; A61H2201/00; A61H2201/16; A61H2201/1602; A61H2201/1604; A61H2205/00; A61H2205/02; A61H2205/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1906-10-12 | 1907-04-13 | 1907-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-10-12 | 1911-04-13 | 1911-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-10-12 | 1915-04-13 | 1915-10-13 | $7700.00 | Window Closed / Lapsed |