US3675307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soldering fluxes
Assignee: Fernox Ltd
•
Filing: 1969-08-08
•
Granted: 1972-07-11
•
Expires: 1989-08-08
Abstract
Abstract A method of soldering or tinning in which the flux used consists of or contains a hydrohalide, other than a hydroiodide, of a monobasic amino acid or of an ester of such acid with an alcohol containing 1 to 10 carbon atoms.
Inventors
- 👤 Rudolf Siegfried Strauss
- 👤 Peter David Teitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:09
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3616
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
17 words
A method as claimed in claim 1, in which the flux consists of the pure crystalline hydrobromide.
Claim 2
Dependent Claim
17 words
A method as claimed in claim 1, in which the flux is a solution of the hydrobromide.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 1, in which the flux is a dispersion of the hydrobromide.
Claim 4
Dependent Claim
29 words
A method as claimed in claim 1, in which the flux is an aqueous solution of the hydrobromide which also contains polyethylene glycol having a molecular weight of 200-1000.
Claim 5
Dependent Claim
27 words
A method as claimed in claim 5, in which the polyethylene glycol is present in an amount of one quarter to twice the weight of the hydrobromide.
Claim 6
Dependent Claim
28 words
A method as claimed in claim 1, in which the flux contains a substituted ammonium halide selected from the group consIsting of isopropylamine hydrobromide and ethyl amine hydrobromide.
Claim 7
Dependent Claim
29 words
A method as claimed in claim 7, in which the substituted ammonium halide is present in an amount of one quarter to twice times the weight of the hydrobromide.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 1, in which the flux is applied as a pre-coating to said metal surface and then dried.
Claim 9
Dependent Claim
27 words
A method as claimed in claim 9, in which the flux is applied to the metal surface as a solution of the hydrobromide in a volatile solvent.
Claim 10
Dependent Claim
22 words
A method as claimed in claim 10, in which the solution is a 5-25% w/vol. solution of valine hydrobromide in isopropyl alcohol.
References Cited (Backward Citations)
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US2756497A
Cited
US2801196A
Cited
US2816357A
Cited
US3035339A
Cited
US2978369A
Cited
US3099590A
Cited
US3436278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |