US1405708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound-operated circuit controller
Assignee: FREDERICK L SAWYER
•
Filing: 1918-11-14
•
Granted: 1922-02-07
•
Expires: 1938-11-14
Abstract
No abstract record available.
Inventors
- 👤 Berger Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
A; A63; A63H; A63H13/00; A63H13/02; A63H3/00; A63H3/28
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) | 1925-02-06 | 1925-08-08 | 1926-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-02-06 | 1929-08-08 | 1930-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-02-06 | 1933-08-08 | 1934-02-07 | $7700.00 | Window Closed / Lapsed |