US4480290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic capacitor including a composite separator between the anode and the cathode thereof
Assignee: LES CANDENSATEURS SIC SAFCO
•
Filing: 1983-05-09
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Granted: 1984-10-30
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Expires: 2003-05-09
Abstract
Abstract The capacitor includes, between an anode and a cathode, a separator formed by at least one porous polymer film and at least one absorbent paper sheet impregnated with an electrolyte, the polymer film being disposed against the anode. The preferred polymer materials are polypropylene and polyester (especially polybutylene terephthalate).
Inventors
- 👤 Jean Constanti
- 👤 Pierre Grandadam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:01
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
An electrolytic capacitor comprising: (a) an anode; (b) a cathode; and (c) a separator located between said anode and said cathode, wherein the separator is formed by the association of at least one film of porous polymer and at least one sheet of absorbant paper impregnated with an electrolyte, and wherein said film of porous polymer is disposed against said anode.
Claim 2
Dependent Claim
61 words
An electrolytic capacitor comprising: (a) an anode; (b) a cathode; and (c) a separator located between said anode and said cathode, wherein the separator is formed by the association of at least one film of porous polymer and at least one sheet of absorbant paper impregnated with an electrolyte, and wherein said film of porous polymer is disposed against said anode.
Claim 3
Dependent Claim
17 words
A capacitor according to claim 1 wherein said film of porous polymer is impregnated with an electrolyte.
Claim 4
Dependent Claim
18 words
A capacitor according to claim 1 wherein said film of porous polymer is a film of porous polypropylene.
Claim 5
Dependent Claim
37 words
A capacitor according to claim 3 wherein said film of porous polypropylene has an open cellular porosity of at least 30 percent and possesses a network of capillaries of section less than 0.2×10 -8 cm 2 .
Claim 6
Dependent Claim
18 words
A capacitor according to claim 1 wherein said film of porous polymer is a film of porous polyester.
Claim 7
Dependent Claim
19 words
A capacitor according to claim 5 wherein said film of porous polyester is a film of porous polybutylene terephtalate.
Claim 8
Dependent Claim
18 words
A capacitor according to claim 1 wherein said absorbant paper has a relative density not greater than 0.55.
Claim 9
Dependent Claim
28 words
A capacitor according to claim 1 wherein said electrolyte comprises, in its solvent phase, at least one solvent chosen from the group consisting of butyrolactone and ethylene glycol.
Claim 10
Dependent Claim
28 words
A capacitor according to claim 2 wherein said electrolyte comprises, in its solvent phase, at least one solvent chosen from the group consisting of butyrolactone and ethylene glycol.
References Cited (Backward Citations)
US3351823A
Cited
US3652902A
Cited
US3638077A
Cited
US3609467A
Cited
US3908157A
Cited
US4099218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |