Patent US3823973A successfully refreshed from Google Patents.
Patent US3159486A successfully refreshed from Google Patents.
US3159486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electrical conductors
Assignee: RCA Corp
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Filing: 1959-08-03
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Granted: 1964-12-01
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Expires: 1979-08-03
Abstract
No abstract record available.
Inventors
- 👤 Clifford W Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:01
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/061; H05K3/064; H05K3/40; H05K3/403; H05K1/00; H05K1/02; H05K1/0286; H05K1/0287; H05K1/0289; H05K1/16; H05K1/165; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09609; H05K2201/09645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN A METHOD OF FORMING DESIRED PATTERNS OF ELECTRICAL CONDUCTORS ON THE SURFACES OF A THIN INSULATED SHEET WITH THE SAID PATTERNS BEING INTERCONNECTED WITH EACH OTHER ALONG DESIRED PARTS OF SIDE PORTIONS OF SAID SHEET, THE STEPS OF COATING SAID SHEET SURFACES AND SIDE PORTIONS WITH CONDUCTIVE METALLIC COATING, APPLYING A PHOTORESIST MATERIAL OVER SAID COATING, EXPOSING BY A DIFFUSED LIGHT SOURCE SAID PHOTORESIST THROUGH PHOTOGRAPHIC NEGATIVE MASKS OF SAID DESIRED PATTERNS WHILE SAID MASKS EXTEND BEYOND SAID SIDE PORTIONS, AND THE SAID MASKS ARE IN REGISTER, OPAGUE PORTIONS OF SAID MASKS PREVENTING EXPOSURE OF SAID PHOTORESIST ALONG AT LEAST PART OF SAID SIDE SIDE PORTIONS AND TRANSPARENT PORTIONS OF SAID MASKS PERMITTING EXPOSURE OF SAID PHOTORESIST ALONG SAID DESIRED PARTS OF SAID SIDE PORTIONS, AND REMOVING THE UNEXPOSED PHOTORESIST AND THE COATING LYING THEREUNDER, WHEREBY SAID DESIRED INTERCONNECTED WINDING PATTERNS ARE PROVIDED BY THE REMAINING PORTIONS OF SAID METALLIC COATING.
Claim 2
Dependent Claim
76 words
IN A METHOD OF FORMING DESIRED PATTERNS OF ELECTRICAL CONDUCTORS ON THE SURFACES OF A THIN INSULATED SHEET, WITH THE SAID PATTERNS BEING INTERCONNECTED WITH EACH OTHER ALONG DESIRED PART OF SIDE PORTIONS OF SAID SHEETS, THE STEPS AS RECITED IN CLAIM 5, WHEREIN SAID SHEET IS IN THE FORM OF A THIN, INSULATED STRIP OF MAGNETIC MATERIAL, AND WHEREIN THE SAID PATTERN OF ELECTRICAL CONDUCTORS ARE INTERCONNECTED ALONG THE SIDE EDGES OF SAID INSULATED STRIP.
References Cited (Backward Citations)
US2897409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |