US3704207A
Expired / Lapsed
US
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Process for forming an isolated circuit pattern on a conductive substrate
Assignee: RCA Corp
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Filing: 1970-04-21
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Granted: 1972-11-28
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Expires: 1990-04-21
Abstract
Abstract A CONDUCTIVE SUBSTRATE IS MODIFIED BY THE APPLICATION OF A THERMO-SETING RESINOUS MIXTURE SUCH THAT THE MODIFIED SUBSTRATE MAY BE CHEMICALLY TREATED DIRECTLY THEREAFTER, IN A SPECIFIED MANNER, TO FORM A PRINTED CIRCUIT BOARD.
Inventors
- 👤 Stokes Fenimore Burtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:54
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/22; C23C18/24; C23C18/1601; C23C18/1603; C23C18/1605; C23C18/1633; C23C18/1646; C23C18/165; C23C18/1653; C23C18/2006; C23C18/2046; C23C18/2073; C23C18/2086; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/056; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/38; H05K3/381; H05K2203/00; H05K2203/02; H05K2203/025; H05K2203/11; H05K2203/1105; H05K3/386; H05K3/387; H05K3/40; H05K3/42; H05K3/425; H05K3/426; H05K3/44; H05K3/445
Claims Analysis
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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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |