US3524143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier systems for electric guitars and the like
Assignee: DH Baldwin Co
•
Filing: 1965-12-15
•
Granted: 1970-08-11
•
Expires: 1985-12-15
Abstract
No abstract record available.
Inventors
- 👤 Walter Munch Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/02; H03G5/04; H03G5/10; G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/18; G10H3/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2805289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |