Patent US4641139B1 successfully refreshed from Google Patents.
US4151581A
Expired / Lapsed
US
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Spacer-electrolyte composite in electrolytic capacitors
Assignee: UNITED CHEMI-CON MANUFACTURING Inc
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Filing: 1977-08-04
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Granted: 1979-04-24
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Expires: 1997-08-04
Abstract
Abstract An electrolytic capacitor contains as a spacer-electrolyte a polymer-liquid electrolyte composite. The composite contains the electrolyte as internal liquid phase and is preferably made of cellulose triacetate. Such a composite has high electrical porosity and reduces the equivalent series resistance of the capacitor.
Inventors
- 👤 Walter J. Bernard
- 👤 Sidney D. Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:07
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
36 words
An electrolytic capacitor having a plurality of foil electrodes, a dielectric film on those electrodes which are anodes, and a cellulose triacetate polymer-liquid composite as spacer, said composite containing as internal liquid phase the capacitor electrolyte.
Claim 2
Dependent Claim
36 words
An electrolytic capacitor having a plurality of foil electrodes, a dielectric film on those electrodes which are anodes, and a cellulose triacetate polymer-liquid composite as spacer, said composite containing as internal liquid phase the capacitor electrolyte.
Claim 3
Dependent Claim
26 words
An electrolytic capacitor according to claim 1 wherein said electrolyte has been added to said polymer-liquid composite by exchange prior to assembly of the capacitor section.
Claim 4
Dependent Claim
25 words
An electrolytic capacitor according to claim 1 wherein said spacer is filled with an electrolyte in which the liquid is a non-solvent for the polymer.
Claim 5
Dependent Claim
14 words
An electrolytic capacitor according to claim 3 wherein said electrolyte is a glycol-borate electrolyte.
Claim 6
Dependent Claim
24 words
An electrolytic capacitor according to claim 1 wherein said polymer-liquid composite spacer is cast onto at least one side of at least one electrode.
Claim 7
Dependent Claim
25 words
An electrolytic capacitor according to claim 5 wherein said electrode onto which said polymer-liquid composite spacer is cast is an aluminum or tantalum foil cathode.
Claim 8
Dependent Claim
21 words
An electrolytic capacitor according to claim 6 wherein said foil cathode is etched prior to casting said polymer-liquid composite onto it.
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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |