US2206012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound treating device
Assignee: Individual
•
Filing: 1938-06-18
•
Granted: 1940-07-02
•
Expires: 1958-06-18
Abstract
No abstract record available.
Inventors
- 👤 Lorren M Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:23
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2811; H04R1/2815; H04R1/2819; H04R1/30
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) | 1943-07-02 | 1944-01-01 | 1944-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-02 | 1948-01-01 | 1948-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-02 | 1952-01-01 | 1952-07-02 | $7700.00 | Window Closed / Lapsed |