US3880728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of lead dioxide/titanium composite electrodes
Assignee: BASF SE
•
Filing: 1974-09-03
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Granted: 1975-04-29
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Expires: 1994-09-03
Abstract
Abstract A method of producing lead dioxide/titanium composite electrodes by anodic deposition of lead dioxide on a titanium surface, in which an intermediate layer of a carbide or boride of an element of sub-group 4 or 5 and/or silicide of an element of sub-group 4, 5 or 6 of the periodic table of the elements and/or silicon carbide, is applied to the titanium surface before depositing the lead dioxide.
Inventors
- 👤 Wolfgang Habermann
- 👤 Heinz Nohe
- 👤 Peter Jaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:41
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; H01M4/661; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A PROCESS FOR THE MANUFACTURE OF A LEAD DIOXIDE/TITANIUM COMPOSITE ELECTRODE BY ANODIC DEPOSITION OF LEAD DIOXIDE ON A TITANIUM SURFACE, WHEREIN AN INTERMEDIATE LAYER OF A CARBIDE OR BORIDE OF AN ELEMENT OF SUB-GROUP 4 OR 5 AND/OR A SILICIDE OF AN ELEMENT OF SUB-GROUP 4, 5 OR 6 OF THE PERIOSIC TABLE OF THE ELEMENTS AND/OR SILICON CARBIDE, IS APPLIED TO THE TITANIUM SURFACE BEFORE DEPOSITING THE LEAD DIOXIDE.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE MANUFACTURE OF A LEAD DIOXIDE/TITANIUM COMPOSITE ELECTRODE BY ANODIC DEPOSITION OF LEAD DIOXIDE ON A TITANIUM SURFACE, WHEREIN AN INTERMEDIATE LAYER OF A CARBIDE OR BORIDE OF AN ELEMENT OF SUB-GROUP 4 OR 5 AND/OR A SILICIDE OF AN ELEMENT OF SUB-GROUP 4, 5 OR 6 OF THE PERIOSIC TABLE OF THE ELEMENTS AND/OR SILICON CARBIDE, IS APPLIED TO THE TITANIUM SURFACE BEFORE DEPOSITING THE LEAD DIOXIDE.
Claim 3
Dependent Claim
29 words
A process as claimed in claim 1, wherein the carbide, boride, silicide and/or silicon carbide is applied by a plasma spraying process, a flame Spraying process or vapor deposition.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1, wherein a carbide or boride is applied in the form of a powder having a particle size of from 15 to 90 Mu .
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1, wherein a silicide and/or silicon carbide is applied by chemical vapor phase deposition.
Claim 6
Dependent Claim
33 words
A process as claimed in claim 1 wherein the intermediate layer applied is from 60 to 200 Mu thick if it contains less than 20 percent by weight of silicide and/or silicon carbide.
Claim 7
Dependent Claim
30 words
A process as claimed in claim 1 wherein a carbide or boride of titanium or tantalum or titanium disilicide, zirconium disilicide, tantalum disilicide, chromium disilicide or niobium disilicide is applied.
Claim 8
Dependent Claim
49 words
A process as claimed in claim 1, wherein a silicide is applied which is modified with a metal or halide of a metal of the iron group and the content of the modifying material, based on the pure metal, does not exceed a total of 5 percent by weight.
Claim 9
Dependent Claim
33 words
A process as claimed in claim 1 wherein the intermediate layer applied is from 20 to 200 Mu thick if it contains more than 20 percent by weight of silicide and/or silicon carbide.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |