US2772192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering flux
Assignee: Primerica Inc
•
Filing: 1952-03-14
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Granted: 1956-11-27
•
Expires: 1972-03-14
Abstract
No abstract record available.
Inventors
- 👤 Delbert E Wobbe
- 👤 Fred J Stasewich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:29
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3615
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A METHOD OF PREPARING A LIQUID SOLDERING FLUX CONTAINING AMMONIUM CHLORIDE, UREA, MONOETHANOL AMINE AND HYDROCHLORIC ACID IN SOLUTION IN A MAJOR PROPORTION OF A VOLATILE ALCOHOL AND A MINOR PROPORTION OF WATER IN WHICH THE WATER CONTENT IS NOT IN EXCESS OF 20% BY WEIGHT OF THE FINISHED FLUX COMPRISING, BLENDING THE NITROGEN CONTAINING INGREDIENTS, ADDING ABOUT 1/6 TO 1/3 OF THE ALCOHOL, ACIDIFYING THE NITROGEN INGREDIENTS WITH AN EXCESS OF CONCENTRATED HYDROCHLORIC ACID AND ADDING THE REMAINDER OF THE VOLATILE ALCOHOL TO FORM A SOLUTION OF THE INGREDIENTS.
References Cited (Backward Citations)
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Cited
US1882734A
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Cited
US1949916A
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US2659684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |