US4140554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-rinsable soldering fluid containing a polyamide dispersant
Assignee: Chevron USA Inc
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Filing: 1977-09-30
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Granted: 1979-02-20
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Expires: 1997-09-30
Abstract
Abstract Disclosed is a water-rinsable soldering fluid comprising a mixture of a polyalkylene ether and a polyamide. The polyamide is formed from the reaction of a carboxylic acid and a polyalkylene polyamine.
Inventors
- 👤 Robert A. Stayner
- 👤 Warren Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:48
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
44 words
A water-rinsable soldering fluid useful in forming a barrier between molten solder and air which comprises a mixture of polyalkylene ether having a flash point greater than 400° F. and a polyamide formed from the reaction of a carboxylic acid and a polyalkylene polyamine.
Claim 2
Dependent Claim
44 words
A water-rinsable soldering fluid useful in forming a barrier between molten solder and air which comprises a mixture of polyalkylene ether having a flash point greater than 400° F. and a polyamide formed from the reaction of a carboxylic acid and a polyalkylene polyamine.
Claim 3
Dependent Claim
40 words
The composition of claim 1 wherein said acid is a fatty acid which contains 12 to 30 carbon atoms and said polyalkylene polyamine contains 2 to 6 alkylene units with from 2 to 4 carbon atoms in each alkylene group.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein said fatty acid contains 16 to 20 carbon atoms.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein said polyalkylene ether has a flash point greater than 500° F.
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein said polyakylene ether comprises the reaction product of nonyl phenol and ethylene oxide.
Claim 7
Dependent Claim
19 words
The composition of claim 1 wherein said polyamide dispersant comprises the reaction product of tetraethylene pentaamine and isostearic acid.
Claim 8
Dependent Claim
14 words
The soldering fluid of claim 1 wherein said soldering fluid also contains an antioxidant.
Claim 9
Dependent Claim
13 words
The soldering fluid of claim 7 wherein said antioxidant is a hindered bis-phenol.
Claim 10
Dependent Claim
13 words
The soldering fluid of claim 7 wherein said antioxidant is phenyl alpha-naphthyl amine.
References Cited (Backward Citations)
US3527625A
Cited
US3589952A
Cited
US3832242A
Cited
US3655461A
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US3837932A
Cited
US3814638A
Cited
US3985587A
Cited
US4060191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |