US3684533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen printable solder compositions
Assignee: EIDP Inc
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Filing: 1970-05-28
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Granted: 1972-08-15
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Expires: 1990-05-28
Abstract
Abstract NOVEL LIQUID VEHICLES COMPRISING AN ACTIVE HYDROGENCONTAINING COMPOUND WHICH IS CAPABLE OF REMOVING SURFACE OXIDES FROM SOLDERING METALS, ROSEN (OR DERIVATIVES THEREOF) AND, OPTIONALLY, AN ORGANIC SOLVENT AND A THIXOTROPIC AGENT. THESE VEHICLES ARE USED TO FORM SCREEN PRINTABLE SOLDER COMPOSITIONS WHICH CONTAIN FINELY DIVIDED SOLDER METALS DISPERSED IN THE VEHICLE. THE USE OF THIS NOVEL VEHICLE PROVIDES GOOD SCREEN PRINTABILITY, GOOD SOLDER FLOWABILITY AT SOLDERING TEMPERATURES, AND ALSO AIDS IN THE FORMATION OF GOOD SOLDER BONDS. THESE COMPOSITIONS ARE PARTICULARLY SUITED FOR SOLDERING ELECTRONIC CIRCUITRY.
Inventors
- 👤 Joel A Conwicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:19
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |