US3984208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodes for solid electrolyte capacitors
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
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Filing: 1974-02-13
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Granted: 1976-10-05
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Expires: 1994-02-13
Abstract
Abstract Improved sintered anodes for solid electrolytic capacitors are produced from a mixture of at least two powders the first being of pure film forming metal and the second of a film forming metal with addition of at least one of the elements : nitrogen, tungsten, molybdenum, vanadium and hafnium. The relative concentration of the added element is between 100 and 20,000 ppm. by weight.
Inventors
- 👤 Jean-Claude Moulin
- 👤 Balint Escher
- 👤 Dominique Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:11
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/042; H01G9/048; H01G9/052; B; B22; B22F; B22F2998/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
78 words
Anodes for solid electrolytic capacitors consisting essentially of a porous sintered body formed of a mixture of at least two different metal powders, the first of said metal powders being of pure film forming metal and the second of said metal powders being of film forming metal containing at least one element from the group consisting of nitrogen, tungsten, molybdenum, vanadium and hafnium, said element constituting about 100 to 20,000 ppm. by weight of said second metal powder.
Claim 2
Dependent Claim
78 words
Anodes for solid electrolytic capacitors consisting essentially of a porous sintered body formed of a mixture of at least two different metal powders, the first of said metal powders being of pure film forming metal and the second of said metal powders being of film forming metal containing at least one element from the group consisting of nitrogen, tungsten, molybdenum, vanadium and hafnium, said element constituting about 100 to 20,000 ppm. by weight of said second metal powder.
Claim 3
Dependent Claim
22 words
Sintered anodes for solid electrolytic capacitors according to claim 1 in which the at least two powders are mechanically mixed before pre-granulating.
Claim 4
Dependent Claim
21 words
Anodes for solid electrolytic capacitors as claimed in claim 1 wherein said different metal powders comprise the same film forming metal.
Claim 5
Dependent Claim
17 words
Anodes for solid electrolytic capacitors as claimed in claim 1 wherein said film forming metal is tantalum.
Claim 6
Dependent Claim
15 words
Anodes for solid electrolytic capacitors as claimed in claim 4 wherein said element is molybdenum.
Claim 7
Dependent Claim
35 words
Anodes for solid electrolytic capacitors as claimed in claim 1 wherein the volume of the second of said metal powders is between 0.2 and 5 times the volume of said first of said metal powders.
Claim 8
Dependent Claim
63 words
Anodes for solid electrolytic capacitors as claimed in claim 1 that consist of a porous sintered body of a mixture of pure powdered tantalum metal and a second powder consisting of tantalum metal containing about 100 to 20,000 ppm. by weight of molybdenum, the volume of said second powder being between 0.2 and 5 times the volume of the pure powdered tantalum metal.
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |