US3779872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode sheet for electrodeposition and method of recovering electrodeposited metals
Assignee: RMI Co
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Filing: 1972-06-15
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Granted: 1973-12-18
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Expires: 1992-06-15
Abstract
Abstract A cathode sheet of titanium for use in an electrodeposition process for metals, such as copper, and a method of recovering the metal. The sheet is thin and its width tapers in the downward direction. After a deposit of the metal has built up on both faces and around the side and bottom edges of the sheet, the sheet and deposit are taken from the electrodeposition apparatus. The deposit is heated to expand it to a greater extent than the sheet, allowing the deposit to be slipped off readily.
Inventors
- 👤 H Bomberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:36
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/06; C25C7/08; C25C7/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
39 words
A sheet as defined in claim 1 in which said sheet has at least one hole near its upper edge within which a slug of metal can be deposited to prevent the deposit from dropping off the cathode prematurely.
Claim 2
Dependent Claim
17 words
A sheet as defined in claim 1 in which the thickness also tapers in the downward direction.
Claim 3
Dependent Claim
57 words
The combination, with an apparatus for electrodeposition of metal, which apparatus includes a tank, and anodes suspended in said tank, said tank being adapted to contain an electrolyte providing ions of the metal undergoing deposition, of cathode sheets suspended in said tank on which the metal is deposited, said sheets being constructed as defined in claim 1.
Claim 4
Dependent Claim
17 words
A combination as defined in claim 4 in which said anodes are of the metal undergoing deposition.
Claim 5
Dependent Claim
31 words
A combination as defined in claim 4 in which said anodes are of an essentially insoluble material of the group consisting of graphite, lead and titanium coated with a low-overvoltage material.
Claim 6
Dependent Claim
125 words
In an electrodeposition process for metals, wherein a metal is deposited on a cathode sheet, an improved method of recovering said metal, said method comprising supporting a cathode sheet in the electrodeposition apparatus, said sheet being of titanium and tapering in width in the downward direction throughout the area in which metal is to be deposited, depositing metal on said sheet until a deposit of the desired thickness has built up on each face thereof and around the side and bottom edges, taking the sheet and deposit from the apparatus, heating the deposit to a temperature about 50* to 300*C higher than the temperature at which it is taken from the apparatus, and slipping said deposit from said sheet in the form of an envelope.
Claim 7
Dependent Claim
13 words
A method as defined in claim 7 in which said metal is copper.
Claim 8
Dependent Claim
26 words
A method as defined in claim 7 in which the thickness of the deposit on each side of the sheet is about 0.25 to 1 inch.
Claim 9
Dependent Claim
40 words
A method as defined in claim 7 in which said sheet has at least one hole near its upper edge and a slug of metal is deposited in said hole to prevent said deposit from dropping off said sheet prematurely.
Claim 10
Dependent Claim
23 words
A method as defined in claim 7 in which removal of said deposit is aided by an applied force including vibration and jolting.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |