US3618442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating plates for sound instruments and method of manufacturing the same
Assignee: Nippon Gakki Co Ltd
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Filing: 1969-10-13
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Granted: 1971-11-09
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Expires: 1989-10-13
Abstract
Abstract A VIBRATING PLATE FOR SOUND INSTRUMENTS COMPRISING A PLURALITY OF FOAMED GRANULES OF A THERMOPLASTIC RESIN AND A BOUNDARY LAYER OF A THERMOSETTING RESIN ADHERING SAID FOAMED GRANULES TOGETHER TO FORM AN INTEGRAL STRUCTURE.
Inventors
- 👤 Genichi Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:01
CPC Classifications
G; G10; G10C; G10C3/00; G10C3/06; C; C08; C08J; C08J9/00; C08J9/22; C08J9/228; C08J9/236; G10D; G10D3/00; G10D3/22; Y; Y10; Y10S; Y10S264/00; Y10S264/07
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |