Patent US3229187A successfully refreshed from Google Patents.
Patent US3254559A successfully refreshed from Google Patents.
US3254559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method op making printed circuit patterns
Assignee: —
•
Filing: —
•
Granted: 1966-06-07
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:53
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70425; G03F7/7045; G03F7/70466; H; H05; H05K; H05K3/00; H05K3/0002; H05K2203/00; H05K2203/05; H05K2203/0548; H05K2203/056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
THE METHOD OF MAKING AN ACCURATE REPRESENTATION OF A PRINTED CIRCUIT PATTERN FROM AN ORIGINAL INACCURATE REPRESENTATION THEREOF COMPRISING PROJECTING TO A SCREEN THROUGH A LENS AN ACCURATE REFERENCE PATTERN AND AN INACCURATE REPRESENTATION OF LANDS OF THE DESIRED PRINTED CIRCUIT PATTERN; APPLYING TO THE SCREEN AN ACCURATE REPRESENTATION OF THE DESIRED PATTERN OF LANDS WITH RESPECT TO THE PROJECTED REFERENCE PATTERN; PROJECTING THE DESIRED PATTERN OF LANDS THROUGH THE SAME LENS SUBSTANTIALLY TO THE POSITION OF THE ORIGINAL REFERENCE PATTERN TO EXPOSE A FIRST LIGHT-SENSITIVE SURFACE; PROCESSING THE LIGHT-SENSITIVE SURFACE TO PROVIDE A POSITIVE TRANSPARENCY OF THE LANDS; PROJECTING TO THE SCREEN SUBSTANTIALLY FROM THE POSITION OF THE ORIGINAL REFERENCE PATTERN THROUGH THE SAME LENS THE POSITIVE TRANSPARENCY OF THE LANDS AND AN INACCURANCE REPRESENTATION OF THE DESIRED PATTERN OF CONDUCTORS BETWEEN THE LANDS; APPLYING TO THE SCREEN AN ACCURATE REPRESENTATION OF THE DESIRED PATTERN OF CONDUCTORS; PROJECTING THE DESIRED PATTERN OF CONDUCTORS THROUGH THE SAME LENS TO EXPOSE A SECOND LIGHT-SENSITIVE SURFACE SUBSTANTIALLY AT THE REFERENCE POSITION; AND CONTACT PRINTING ON THE SECOND LIGHT-SENSITIVE SURFACE THE LANDS OF THE TRANSPARENCY.
Claim 2
Independent Claim
182 words
THE METHOD OF MAKING AN ACCURATE REPRESENTATION OF A PRINTED CIRCUIT PATTERN FROM AN ORIGINAL INACCURATE REPRESENTATION THEREOF COMPRISING PROJECTING TO A SCREEN THROUGH A LENS AN ACCURATE REFERENCE PATTERN AND AN INACCURATE REPRESENTATION OF LANDS OF THE DESIRED PRINTED CIRCUIT PATTERN; APPLYING TO THE SCREEN AN ACCURATE REPRESENTATION OF THE DESIRED PATTERN OF LANDS WITH RESPECT TO THE PROJECTED REFERENCE PATTERN; PROJECTING THE DESIRED PATTERN OF LANDS THROUGH THE SAME LENS SUBSTANTIALLY TO THE POSITION OF THE ORIGINAL REFERENCE PATTERN TO EXPOSE A FIRST LIGHT-SENSITIVE SURFACE; PROCESSING THE LIGHT-SENSITIVE SURFACE TO PROVIDE A POSITIVE TRANSPARENCY OF THE LANDS; PROJECTING TO THE SCREEN SUBSTANTIALLY FROM THE POSITION OF THE ORIGINAL REFERENCE PATTERN THROUGH THE SAME LENS THE POSITIVE TRANSPARENCY OF THE LANDS AND AN INACCURANCE REPRESENTATION OF THE DESIRED PATTERN OF CONDUCTORS BETWEEN THE LANDS; APPLYING TO THE SCREEN AN ACCURATE REPRESENTATION OF THE DESIRED PATTERN OF CONDUCTORS; PROJECTING THE DESIRED PATTERN OF CONDUCTORS THROUGH THE SAME LENS TO EXPOSE A SECOND LIGHT-SENSITIVE SURFACE SUBSTANTIALLY AT THE REFERENCE POSITION; AND CONTACT PRINTING ON THE SECOND LIGHT-SENSITIVE SURFACE THE LANDS OF THE TRANSPARENCY.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |