US3424658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a printed circuit board on a metallic substrate
Assignee: CLYDE A NORTON
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Filing: 1965-10-21
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Granted: 1969-01-28
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Clyde A Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:45
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/053; H05K3/00; H05K3/10; H05K3/107; H05K3/44; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0364; H05K2201/0376; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09745; H05K2203/00; H05K2203/03; H05K2203/0315; H05K2203/0323; H05K2203/0369; H05K3/02; H05K3/06; H05K3/18; H05K3/181; H05K3/182; H05K3/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF MAKING A CIRCUIT BOARD WHICH CONSISTS OF SELECTING AN ALUMINUM OR ALUMINUM-CONTAINING PLATE CAPABLE OF BEING ANODIZED, APPLYING A RESIST TO THE FACE OF SAID PLATE, EXPOSING SAID RESIST THROUGH A POSITIVE FILM EXCEPT WHERE THE CONDUCTOR PATTERN IS TO BE, REMOVING THE UNEXPOSED RESIST, ETCHING THE PLATE IN AREAS UNPROTECTED BY THE RESIST TO PROVIDE GROOVES THEREIN, ANODIZING SAID PLATE, CHEMICALLY APPLYING A CONDUCTING COATING TO THE INTERIOR OF SAID GROOVES, AND ELECTROPLATING A CONDUCTOR INTO SAID GROOVES TO BUILD UP THE CONDUCTING PATTERN THEREIN.
Claim 2
Independent Claim
89 words
THE METHOD OF MAKING A CIRCUIT BOARD WHICH CONSISTS OF SELECTING AN ALUMINUM OR ALUMINUM-CONTAINING PLATE CAPABLE OF BEING ANODIZED, APPLYING A RESIST TO THE FACE OF SAID PLATE, EXPOSING SAID RESIST THROUGH A POSITIVE FILM EXCEPT WHERE THE CONDUCTOR PATTERN IS TO BE, REMOVING THE UNEXPOSED RESIST, ETCHING THE PLATE IN AREAS UNPROTECTED BY THE RESIST TO PROVIDE GROOVES THEREIN, ANODIZING SAID PLATE, CHEMICALLY APPLYING A CONDUCTING COATING TO THE INTERIOR OF SAID GROOVES, AND ELECTROPLATING A CONDUCTOR INTO SAID GROOVES TO BUILD UP THE CONDUCTING PATTERN THEREIN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |