Patent US4784707A successfully refreshed from Google Patents.
US4784707A
Expired / Lapsed
US
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Method of making electrical connections using joint compound
Assignee: Alcoa Corp
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Filing: 1986-02-07
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Granted: 1988-11-15
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Expires: 2006-02-07
Abstract
Abstract Electrical joint compounds for the protection of electrical connections are formed from a solution of polymer dissolved in solvent with or without conductive filler. Partially cured thermosetting polymers are preferred as they flow under service conditions to better seal the electrical joints. Thermosetting polymers which cure by an addition mechanism are preferred over those which cure by condensation, and polyimides are most preferred.
Inventors
- 👤 Karl Wefers
- 👤 Larry T. Taylor
- 👤 Richard H. Bott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:57
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/58; H01R4/62; H01B; H01B1/00; H01B1/20; H01B1/22
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
31 words
In a method of making an electrical connection wherein joint compound is applied, the improvement comprising applying as joint compound a solution of polymer and electrically conductive filler dissolved in solvent.
Claim 2
Dependent Claim
31 words
In a method of making an electrical connection wherein joint compound is applied, the improvement comprising applying as joint compound a solution of polymer and electrically conductive filler dissolved in solvent.
Claim 3
Dependent Claim
13 words
A method as claimed in claim 1, the electrical connection comprising aluminum metal.
Claim 4
Dependent Claim
11 words
A method as claimed in claim 2, said polymer comprising polyimide.
Claim 5
Dependent Claim
28 words
A method as claimed in claim 1, wherein the joint compound is applied at an interface and the polymer is an addition-type thermosetting polymer or a thermoplastic polymer.
Claim 6
Dependent Claim
15 words
A method as claimed in claim 4, the joint compound containing an electrically conductive filler.
Claim 7
Dependent Claim
28 words
A method as claimed in claim 1, the solvent and polymer being matched in relative amounts and character essentially to avoid air pockets, voids, and loss of contact.
Claim 8
Dependent Claim
11 words
A method as claimed in claim 1, said polymer comprising polyimide.
Claim 9
Dependent Claim
20 words
A method as claimed in claim 7, said polymer comprising a polyisoimide having a structural formula essentially as follows ##STR1##
Claim 10
Dependent Claim
11 words
A method as claimed in claim 8, the solvent comprising THF.
Claim 11
Dependent Claim
22 words
A method as claimed in claim 7, said polymer comprising an essentially fully imidized polyimide resin derived from phenylindane diamine and dianhydride.
Claim 12
Dependent Claim
11 words
A method as claimed in claim 10, said solvent comprising THF.
Claim 13
Dependent Claim
47 words
In a method of making an electrical connection wherein joint compound is applied, the improvement comprising applying as joint compound a solution of incompletely cross linked flowable thermosetting polymer dissolved in solvent, and not fully cross linking the polymer until the electrical connection is placed in use.
Claim 14
Dependent Claim
47 words
In a method of making an electrical connection wherein joint compound is applied, the improvement comprising applying as joint compound a solution of incompletely cross linked flowable thermosetting polymer dissolved in solvent, and not fully cross linking the polymer until the electrical connection is placed in use.
Claim 15
Dependent Claim
13 words
A method as claimed in claim 12, the electrical connection comprising aluminum metal.
Claim 16
Dependent Claim
11 words
A method as claimed in claim 13, said polymer comprising polyimide.
Claim 17
Dependent Claim
24 words
A method as claimed in claim 12, wherein the joint compound is applied at an interface and the polymer is an addition-type thermosetting polymer.
Claim 18
Dependent Claim
15 words
A method as claimed in claim 15, the joint compound containing an electrically conductive filler.
Claim 19
Dependent Claim
28 words
A method as claimed in claim 12, the solvent and polymer being matched in relative amounts and character essentially to void air pockets, voids, and loss of contact.
Claim 20
Dependent Claim
11 words
A method as claimed in claim 12, said polymer comprising polyimide.
Claim 21
Dependent Claim
23 words
A method as claimed in claim 18, said polymer comprising a polyisoimide having a structural formula essentially as set forth in claim 18.
Claim 22
Dependent Claim
11 words
A method as claimed in claim 19, the solvent comprising THF.
Claim 23
Dependent Claim
22 words
A method as claimed in claim 18, said polymer comprising an essentially fully imidized polyimide resin derived from phenylindane diamine and dianhydride.
Claim 24
Dependent Claim
11 words
A method as claimed in claim 21, said solvent comprising THF.
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) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |