Patent US3453920A successfully refreshed from Google Patents.
US3453920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezo guitar bridge pickup
Assignee: Fred W Gretsch Enterprises Ltd
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Filing: 1966-06-29
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Granted: 1969-07-08
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Expires: 1986-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robert C Scherer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:50
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/18; G10H3/185; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; G10H2220/00; G10H2220/461; G10H2220/465; G10H2220/471; G10H2220/491; G10H2220/525; Y; Y10; Y10S; Y10S84/00; Y10S84/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3137754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |