US3642602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating apparatus
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1970-04-13
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Granted: 1972-02-15
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Expires: 1990-04-13
Abstract
Abstract In electroplating an anisotropic magnetic film onto wires, current through the wires during the plating process is used to create the magnetic anisotropy in the film. The resulting voltage drop along the length of the cathodic wires results in nonuniform chemical composition in the film along the length of the wires. Such nonuniform compositions are eliminated in the apparatus and method of the present invention by providing an equal voltage drop along the length of the anode.
Inventors
- 👤 Sigfrid Schweizerhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:31
CPC Classifications
H; H01; H01F; H01F10/00; C; C25; C25D; C25D17/00; C25D17/10; C25D17/12; C25D5/00; C25D5/003; C25D7/00; C25D7/06; C25D7/0607; H01F10/06; Y; Y10; Y10S; Y10S205/00; Y10S205/922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
22 words
An apparatus as claimed in claim 1, said cathode being a wire, said anode being a cylinder arranged concentrically about said cathode.
Claim 2
Dependent Claim
42 words
An apparatus as claimed in claim 1, said anode being a cage of mutually parallel wires extending parallel to the cathode, the cathode being a wire, the cage being concentric to the cathode, the wires of the cage being connected in parallel.
Claim 3
Dependent Claim
25 words
An apparatus as claimed in claim 1, said cathode being a wire, said anode being a wire in a cylindrical helix concentric to said cathode.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |