Patent US3741858A successfully refreshed from Google Patents.
US3741858A
Expired / Lapsed
US
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Printed circuit board
Assignee: Sony Corp
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Filing: 1971-08-09
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Granted: 1973-06-26
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Expires: 1991-08-09
Abstract
Abstract A PRINTED CIRCUIT BOARD INCLUDING AN EPOXY RESIN IMPREGNATED GLASS FIBER BOARD AND A COPPER FOIL LAMINATED THEREON WITH AN ADHESIVE IS SHOWN. THE ADHESIVE IS COMPRISED OF A PHENOXY RESIN, A LOW MOLECULAR EPOXY RESIN AND A CROSS-LINKING AGENT THEREBETWEEN.
Inventors
- 👤 Y Fujiwara
- 👤 K Naito
- 👤 T Odajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:34
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4021; B; B32; B32B; B32B15/00; B32B15/14; B32B7/00; B32B7/04; B32B7/12; C08G59/4071; C08G59/50; C08G59/5046; C08G59/5053; C08G59/506; C08G59/5066; C08L; C08L63/00; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H05; H05K; H05K3/00; H05K3/38; H05K3/386; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/101; B32B2457/00; B32B2457/08; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31525
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |