US3899723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode foil for electrolytic condensers
Assignee: Rio Tinto Switzerland AG
•
Filing: 1973-11-26
•
Granted: 1975-08-12
•
Expires: 1993-11-26
Abstract
Abstract Cathode foil for electrolytic condensers made from an aluminum base alloy containing 0.2 to 2 percent manganese and presenting before etching a tensile strength above 10 kg/mm2, preferably from 12 to 18 kg/mm2.
Inventors
- 👤 Martin Muhlhausser
- 👤 Christian Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:11
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/042; H01G9/045; C; C22; C22C; C22C21/00; H01G9/0425; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
IN AN ELECTROLYTIC CONDENSER, A FOIL STRIP CATHODE ELECTRODE COMPRISING AN ALLOY OF 0.2 TO 2.0 PERCENT BY WEIGHT OF MANGANESE AND THE BALANCE OF THE ALLOY BEING COMMERCIALLY PURE ALUMIMUM HAVING A PURITY OF FROM 99.0TO 99.8 PERCENT BY WEIGHT, SAID ELECTRODE HAVING A THICKNESS FROM 0.0043 TO 0.1520 MILLIMETERS.
Claim 2
Dependent Claim
51 words
IN AN ELECTROLYTIC CONDENSER, A FOIL STRIP CATHODE ELECTRODE COMPRISING AN ALLOY OF 0.2 TO 2.0 PERCENT BY WEIGHT OF MANGANESE AND THE BALANCE OF THE ALLOY BEING COMMERCIALLY PURE ALUMIMUM HAVING A PURITY OF FROM 99.0TO 99.8 PERCENT BY WEIGHT, SAID ELECTRODE HAVING A THICKNESS FROM 0.0043 TO 0.1520 MILLIMETERS.
Claim 3
Dependent Claim
61 words
A foil strip cathode electrode for use as a cathode foil of an electrolytic condenser, comprising an alloy of 0.2 to 2.0 percent by weight of manganese and the balance of the alloy being commercially pure aluminum having a purity of from 99.0 to 99.8 percent by weight, said foil strip cathode electrode having a thickness from 0.0043 to 0.1520 millimeters.
Claim 4
Dependent Claim
61 words
A foil strip cathode electrode for use as a cathode foil of an electrolytic condenser, comprising an alloy of 0.2 to 2.0 percent by weight of manganese and the balance of the alloy being commercially pure aluminum having a purity of from 99.0 to 99.8 percent by weight, said foil strip cathode electrode having a thickness from 0.0043 to 0.1520 millimeters.
References Cited (Backward Citations)
US2296866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |