US4910644A
Expired / Lapsed
US
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Capacitor electrolyte and process therefor
Assignee: UNITED CHEMI-CON MANUFACTURING Inc
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Filing: 1989-07-17
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Granted: 1990-03-20
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Expires: 2009-07-17
Abstract
Abstract An electrolytic capacitor employs an electrolyte having amic acid salts prepared in situ in the electrolyte by reacting a cyclic anhydride with ammonia or an amine in an aprotic solvent acting as an acceptor in hydrogen bonding and thereafter adding glycol.
Inventors
- 👤 Sidney D. Ross
- 👤 Shirley A. Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:44
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
An electrolytic capacitor comprising separated electrodes, at least one of said electrodes bearing a dielectric oxide, an electrolyte bridging the separation between said electrodes, said electrolyte being an in situ produced amate salt solute dissolved in a mixed solvent of an aprotic solvent which is an acceptor in hydrogen bonding and glycol.
Claim 2
Dependent Claim
52 words
An electrolytic capacitor comprising separated electrodes, at least one of said electrodes bearing a dielectric oxide, an electrolyte bridging the separation between said electrodes, said electrolyte being an in situ produced amate salt solute dissolved in a mixed solvent of an aprotic solvent which is an acceptor in hydrogen bonding and glycol.
Claim 3
Dependent Claim
48 words
A process for preparing a capacitor electrolyte comprising reacting a cyclic anhydride with a member selected from ammonia and an amine in an aprotic solvent acting as an acceptor in hydrogen bonding to form an amate salt solute, and then adding glycol to effect solubilization of said amate.
Claim 4
Dependent Claim
48 words
A process for preparing a capacitor electrolyte comprising reacting a cyclic anhydride with a member selected from ammonia and an amine in an aprotic solvent acting as an acceptor in hydrogen bonding to form an amate salt solute, and then adding glycol to effect solubilization of said amate.
Claim 5
Dependent Claim
22 words
The process of claim 2 wherein said cyclic anhydride is selected from the group of succinic anhydride, maleic anhydride, and phthalic anhydride.
Claim 6
Dependent Claim
19 words
The process of claim 2 wherein said aprotic solvent is selected from the group of N,N-dimethylformamide, γ-butyrolactone, and N-methylpyrrolidinone.
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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |