Patent US3618442A successfully refreshed from Google Patents.
US3618442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibrating plates for sound instruments and method of manufacturing the same
Assignee: Nippon Gakki Co Ltd
•
Filing: 1969-10-13
•
Granted: 1971-11-09
•
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 07:17
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
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 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 |