US4097415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of improved anodes for solid electrolyte capacitors
Assignee: Lignes Telegraphiques et Telephoniques LTT SA
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Filing: 1976-03-09
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Granted: 1978-06-27
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Expires: 1996-03-09
Abstract
Abstract Improved anodes for solid electrolytic capacitors are produced by introducing in the anode body made of a film forming sintered metal powder one of the following additives : tungsten, molybdenum, vanadium and hafnium, at the most suitable step of the manufacturing process previous to sintering under one of the following forms : pure metal, oxide, sulphide. In a preferred embodiment the additive is introduced in the binder used for pelletizing. In another embodiment the additive is introduced by dipping the presintered anodes in a solution containing said additive.
Inventors
- 👤 Jean-Claude Moulin
- 👤 Balint Escher
- 👤 Dominique Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:45
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/052; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/1216
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
A method for producing anodes of film forming metal for dry electrolytic capacitors which comprises: providing a quantity of powdered film forming metal to constitute an anode, mixing said powder with a binder, pressing the resulting mixture into a pellet, introducing within said pellet an additive comprising a compound of an element selected from the group consisting of W, Mo, V and Hf with a non-metal element selected from the group consisting of O, S, Se and Te, and sintering the resulting pellet.
Claim 2
Independent Claim
83 words
A method for producing anodes of film forming metal for dry electrolytic capacitors which comprises: providing a quantity of powdered film forming metal to constitute an anode, mixing said powder with a binder, pressing the resulting mixture into a pellet, introducing within said pellet an additive comprising a compound of an element selected from the group consisting of W, Mo, V and Hf with a non-metal element selected from the group consisting of O, S, Se and Te, and sintering the resulting pellet.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said compound is molybdenum sulphide and said pellet is formed of tantalum.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said additive is a mixture of molybdenum oxide and molybdenum sulphide.
Claim 5
Independent Claim
72 words
A method for producing anodes of film forming metal for dry electrolyte capacitors which comprises the steps: providing a quantity of powdered film forming metal to constitute an anode, mixing said powder with a binder, pressing the resulting mixture into a pellet, presintering the pressed pellet, introducing within the presintered pellet an additive comprising an element selected from the group consisting of W, Mo, V and Hf, and sintering the resulting pellet.
Claim 6
Independent Claim
72 words
A method for producing anodes of film forming metal for dry electrolyte capacitors which comprises the steps: providing a quantity of powdered film forming metal to constitute an anode, mixing said powder with a binder, pressing the resulting mixture into a pellet, presintering the pressed pellet, introducing within the presintered pellet an additive comprising an element selected from the group consisting of W, Mo, V and Hf, and sintering the resulting pellet.
Claim 7
Dependent Claim
18 words
The method of claim 4 wherein said additive consists of the pure element W, Mo, V or Hf.
Claim 8
Dependent Claim
23 words
The method of claim 4 wherein said additive is introduced within said pellet by dipping the pellet into a solution containing the additive.
Claim 9
Dependent Claim
17 words
The method of claim 6 wherein said solution contains molybdenum and said pellet is formed of tantalum.
Claim 10
Independent Claim
82 words
A method for producing anodes of film forming metal for dry electrolytic capacitors comprising the steps: providing a quantity of powdered film forming metal to constitute an anode, mixing said powder with a binder comprising at least one substance selected from the group consisting of the pure element W, Mo, V and Hf and compounds thereof with a non-metal element selected from the group consisting of O, S, Se and Te, pressing the resulting mixture into a pellet, and sintering the pellet.
Claim 11
Independent Claim
82 words
A method for producing anodes of film forming metal for dry electrolytic capacitors comprising the steps: providing a quantity of powdered film forming metal to constitute an anode, mixing said powder with a binder comprising at least one substance selected from the group consisting of the pure element W, Mo, V and Hf and compounds thereof with a non-metal element selected from the group consisting of O, S, Se and Te, pressing the resulting mixture into a pellet, and sintering the pellet.
Claim 12
Dependent Claim
34 words
The method of claim 4 wherein the quantity of said additive introduced into said presintered pellet is between about 100 and 20,000 parts per million by weight based upon the weight of the pellet.
Claim 13
Dependent Claim
13 words
An anode for dry electrolytic capacitors prepared by the process of claim 9.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |