US3239373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit process
Assignee: Individual
•
Filing: 1962-04-24
•
Granted: 1966-03-08
•
Expires: 1982-04-24
Abstract
No abstract record available.
Inventors
- 👤 Louis S Hoodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:26
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; H05K3/184; H05K3/187; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A PROCESS FOR THE FABRICATION OF PRINTED CIRCUITS WHICH COMPRISES THE STEPS OF OUTLINING ON A WATER WETTABLE SURFACE OF A BASE MEMBER A DESIRED PATTERN TO BE METALLIZED BY APPLYING THEREON A DEPOSIT OF A HIGHLY WATER-REPELLENT OVERLAY COATING IN A MANNER OUTLINING SAID PATTERN AND SHIELDING AREAS NOT TO BE METALLIZED WITH SAID WATER-REPELLENT COATING; AND SUBJECTING SAID SURFACE OF SAID BASE MEMBER TO A SPRAY TREATMENT COMPRISING TWO CONFLUENTLY DIRECTED STREAMS OF AQUEOUS SOLUTIONS ONE OF WHICH CONTAINS A SALT OF THE METAL TO BE DEPOSITED, AND THE OTHER OF WHICH CONTAINS A PRECIPITATING AGENT REACTIVE WITH THE SALT UPON CONFLUENT INTERMINGLING OF THE SOLUTIONS ON SAID TREATED SURFACE TO CAUSE THE METAL TO BE LIBERATED AND DEPOSITED AS A FILM ON ANY AREAS WHICH ARE FREE OF SAID WATER-REPELLENT COATING SUBSTANCE, SAID SOLUTIONS AND RESULTANT DEPOSITING OF METAL THEREFROM BEING EFFECTIVELY REPELLED FROM AREAS COVERED BY SAID SUBSTANCE SO THAT NO METAL IS DEPOSITED ON SAID COATING.
Claim 2
Dependent Claim
161 words
A PROCESS FOR THE FABRICATION OF PRINTED CIRCUITS WHICH COMPRISES THE STEPS OF OUTLINING ON A WATER WETTABLE SURFACE OF A BASE MEMBER A DESIRED PATTERN TO BE METALLIZED BY APPLYING THEREON A DEPOSIT OF A HIGHLY WATER-REPELLENT OVERLAY COATING IN A MANNER OUTLINING SAID PATTERN AND SHIELDING AREAS NOT TO BE METALLIZED WITH SAID WATER-REPELLENT COATING; AND SUBJECTING SAID SURFACE OF SAID BASE MEMBER TO A SPRAY TREATMENT COMPRISING TWO CONFLUENTLY DIRECTED STREAMS OF AQUEOUS SOLUTIONS ONE OF WHICH CONTAINS A SALT OF THE METAL TO BE DEPOSITED, AND THE OTHER OF WHICH CONTAINS A PRECIPITATING AGENT REACTIVE WITH THE SALT UPON CONFLUENT INTERMINGLING OF THE SOLUTIONS ON SAID TREATED SURFACE TO CAUSE THE METAL TO BE LIBERATED AND DEPOSITED AS A FILM ON ANY AREAS WHICH ARE FREE OF SAID WATER-REPELLENT COATING SUBSTANCE, SAID SOLUTIONS AND RESULTANT DEPOSITING OF METAL THEREFROM BEING EFFECTIVELY REPELLED FROM AREAS COVERED BY SAID SUBSTANCE SO THAT NO METAL IS DEPOSITED ON SAID COATING.
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |