Patent US3672934A successfully refreshed from Google Patents.
US3672934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving line resolution in screen printing
Assignee: EIDP Inc
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Filing: 1970-05-01
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Granted: 1972-06-27
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Expires: 1990-05-01
Abstract
Abstract THE INVENTION RELATES TO DECREASING THE WETTABILITY OF THE SCREEN AND/OR SUBSTRATE SURFACE USED IN SCREEN PRINTING BY TREATING AT LEAST ONE OF SAID SURFACES WITH A FLUORINATED ORGANIC COMPOUND WHICH REDUCES THE SURFACE ENERGY OF THE TREATED SURFACE. THE OBJECT IS TO COAT THE SURFACES WHICH CONTACT THE SCREEN PRINTING PASTE WHEREBY ANY SPREADING OF THE PASTE ON THE SUBSTRATE IS SIGNIFICANTLY REDUCED. THIS PROCESS PROVIDES A MEANS FOR SCREEN PRINTING FINE LINE PATTERNS ONTO CONVENTIONAL SUBSTRATES AS CURRENTLY DEMANDED IN THE ELECTRONIC INDUSTRY.
Inventors
- 👤 John R Larry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:57
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/24; B41N1/247; H; H05; H05K; H05K3/00; H05K3/10; H05K3/12; H05K3/1216; H05K3/1225
Claims Analysis
Total Claims: 0
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |