US2803572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering flux
Assignee: NL Industries Inc
•
Filing: 1955-07-27
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Granted: 1957-08-20
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Expires: 1975-07-27
Abstract
No abstract record available.
Inventors
- 👤 Konig Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:35
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3615
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A SOLDERING FLUX CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF (1) THE HEXAMETHLENETETRAMINE SALT OF A VOLATILE ACID AND (2) A SMALL PROPORTION OF AN ALKALINE AGENT, SAID PROPORTION BEING EFFECTIVE TO PROVES A SUBSTANTIALLY NEUTRAL PH IN SAID SOLUTION, SALT ALKALINE AGENT BEING VOLATILE AT SOLDERING TEMPERATURES.
Claim 2
Dependent Claim
48 words
A SOLDERING FLUX CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF (1) THE HEXAMETHLENETETRAMINE SALT OF A VOLATILE ACID AND (2) A SMALL PROPORTION OF AN ALKALINE AGENT, SAID PROPORTION BEING EFFECTIVE TO PROVES A SUBSTANTIALLY NEUTRAL PH IN SAID SOLUTION, SALT ALKALINE AGENT BEING VOLATILE AT SOLDERING TEMPERATURES.
References Cited (Backward Citations)
US1772952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |