US3867129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodically oxidizable metal powder
Assignee: TANTALUM PRODUCTION Inc A DE CORP
•
Filing: 1974-02-05
•
Granted: 1975-02-18
•
Expires: 1994-02-05
Abstract
Abstract An anodically oxidizable metal powder for use in electrolytic capacitor applications, the individual metal particles containing in depth and/or surface evenly or unevenly distributed amounts of the metals molybdenum and/or vanadium and/or tungsten and/or hafnium.
Inventors
- 👤 Gerard S Ronneau
- 👤 Pierre D Debacker
- 👤 Hugo L Carpentier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:51
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/042; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12181
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
48 words
A VALVE E-METAL BASE POWDER FOR USE IN ELECTRONICS, THE GRAINS OF WHICH POWDER ARE MADE UP OF THE SAID VALVE-METAL CONTAINING BETWEEN ABOUT 0.06 AND ABOUT 2 PERCENT BY WEIGHT OF AT LEAST ONE ADDITIVE METAL CHOSEN IN THE GROUP CONSISTING OF MO, V, W, AND HF.
Claim 2
Dependent Claim
48 words
A VALVE E-METAL BASE POWDER FOR USE IN ELECTRONICS, THE GRAINS OF WHICH POWDER ARE MADE UP OF THE SAID VALVE-METAL CONTAINING BETWEEN ABOUT 0.06 AND ABOUT 2 PERCENT BY WEIGHT OF AT LEAST ONE ADDITIVE METAL CHOSEN IN THE GROUP CONSISTING OF MO, V, W, AND HF.
Claim 3
Dependent Claim
59 words
A valve-metal base powder for use in electronics, the grains of which powder are made up of a nucleus of the said valve-metal covered with a surface layer of the same valve-metal containing between about 0.01 and about 2 percent by weight of at least one additive metal chosen in the group consisting of No, V, W and Hf.
Claim 4
Dependent Claim
59 words
A valve-metal base powder for use in electronics, the grains of which powder are made up of a nucleus of the said valve-metal covered with a surface layer of the same valve-metal containing between about 0.01 and about 2 percent by weight of at least one additive metal chosen in the group consisting of No, V, W and Hf.
Claim 5
Dependent Claim
20 words
A powder as claimed in claim 2, in which the thickness of the surface layer is lower than 3,000 Angstroms.
Claim 6
Dependent Claim
45 words
A valve-metal base powder for use in electronics, the grains of which powder are made up of a nucleus of the said valve-metal covered with a surface layer consisting of at least one metal chosen in the group consisting of Mo, V, W and Hf.
Claim 7
Dependent Claim
45 words
A valve-metal base powder for use in electronics, the grains of which powder are made up of a nucleus of the said valve-metal covered with a surface layer consisting of at least one metal chosen in the group consisting of Mo, V, W and Hf.
Claim 8
Dependent Claim
20 words
A powder as claimed in claim 4, in which the thickness of the surface layer is lower than 3,000 Angstroms.
Claim 9
Dependent Claim
22 words
A powder as claimed in claim 1, in which the said valve-metal is chosen in the group consisting of tantalum and niobium.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |