US2690091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone generator
Assignee: Stromberg Carlson Corp
•
Filing: 1950-12-04
•
Granted: 1954-09-28
•
Expires: 1970-12-04
Abstract
No abstract record available.
Inventors
- 👤 Frank H Slaymaker
- 👤 Willard F Meeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/20; Y; Y10; Y10T; Y10T82/00; Y10T82/25; Y10T82/2514; Y10T82/2516; Y10T82/2518
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US967477A
Cited
US1269511A
Cited
US1727238A
Cited
US2413062A
Cited
US2581963A
Cited
US2502722A
Cited
US2606474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |