US4549686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase soldering using perfluorotetradecahydrophenanthrene (C14 F24)
Assignee: ISC Chemicals Ltd
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Filing: 1984-04-30
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Granted: 1985-10-29
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Expires: 2004-04-30
Abstract
Abstract A method of soldering wherein a component or components to be soldered, such as a printed circuit board and soldered preforms, are immersed in a vapor bath to melt the solder, following which the components are withdrawn from the vapor bath. In the method according to the invention, the vapor bath is composed predominantly of perfluorotetradecahydrophenanthrene (C14F24).
Inventors
- 👤 Colin R. Sargent
- 👤 Keith Brierley
- 👤 David E. M. Wotton
- 👤 Paul L. Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:59
CPC Classifications
B; B23; B23K; B23K3/00; B23K1/00; B23K1/012; B23K1/015; B23K35/00; B23K35/22; B23K35/38; B23K35/386
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
In a method of soldering wherein a component to be soldered is immersed in a vapour bath to melt the solder, and the component is then withdrawn from the vapour bath, the improvement comprising that the vapour bath is composed predominantly of perfluorotetradecahydrophenanthrene (C 14 F 24 ).
Claim 2
Dependent Claim
48 words
In a method of soldering wherein a component to be soldered is immersed in a vapour bath to melt the solder, and the component is then withdrawn from the vapour bath, the improvement comprising that the vapour bath is composed predominantly of perfluorotetradecahydrophenanthrene (C 14 F 24 ).
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein there is used a component which carries a solder having a melting point below 200° C.
Claim 4
Dependent Claim
15 words
The method according to claim 2, wherein the solder used is a 60/40 tin/lead solder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |