US4441965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Codeposition method
Assignee: C Uyemura & Co Ltd
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Filing: 1983-05-20
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Granted: 1984-04-10
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Expires: 2003-05-20
Abstract
Abstract A method for codepositing a water-insoluble material with a metal from a plating solution having the metal ion dissolved and the water-insoluble material suspended therein, characterized by pumping at least one third per minute of the volume of the plating solution by means of a pump without entraining air bubbles, and injecting the thus pumped volume downward into the bath through a plurality of holes in the lower side of a sparger pipe connected to said pump and located at a lower level in a plating tank, thereby circulating and fluidizing the plating solution in which codeposition is being carried out.
Inventors
- 👤 Sowjun Matsumura
- 👤 Ken Araki
- 👤 Tetsuo Otaka
- 👤 Masumi Tanigawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:28
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/08; C25D15/00; C25D15/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
The method for codepositing a water-insoluble material with a metal from a plating solution having the metal ion dissolved and the water-insoluble material suspended therein, characterized by pumping at least one third per minute of the volume of the plating solution by means of a pump without entraining air bubbles, and injecting the thus pumped volume downward into the bath through a plurality of holes in the lower side of a sparger pipe connected to said pump and located at a lower level in a plating tank, thereby circulating and fluidizing the plating solution in which codeposition is being carried out.
Claim 2
Independent Claim
101 words
The method for codepositing a water-insoluble material with a metal from a plating solution having the metal ion dissolved and the water-insoluble material suspended therein, characterized by pumping at least one third per minute of the volume of the plating solution by means of a pump without entraining air bubbles, and injecting the thus pumped volume downward into the bath through a plurality of holes in the lower side of a sparger pipe connected to said pump and located at a lower level in a plating tank, thereby circulating and fluidizing the plating solution in which codeposition is being carried out.
Claim 3
Dependent Claim
14 words
A codepositing method according to claim 1 wherein said pump is a seal-free pump.
Claim 4
Dependent Claim
23 words
The codepositing method according to claim 1 wherein said pump discharges the plating solution at a discharge head of at least 3 meters.
Claim 5
Dependent Claim
28 words
The codepositing method according to claim 1 wherein said sparger pipe extends in proximity to the bottom of the tank from one end to the opposed end thereof.
Claim 6
Dependent Claim
87 words
The codepositing method according to claim 1 wherein said plurality of holes are formed in the lower side of the sparger pipe at substantially equal intervals, said holes having a diameter such that the cross-sectional area of each hole is 0.5% to 3% of the cross-sectional area of the flow path in said sparger pipe, and the number of said holes is such that the total cross-sectional area of the holes occupies 20% to 90% of the cross-sectional area of the flow path in said sparger pipe.
Claim 7
Dependent Claim
38 words
The codepositing method according to claim 1 wherein the plating solution is injected through the sparger holes at a flow velocity of 1 to 12 m/sec. and under a discharge pressure of 0.5 to 5 kg/cm 2 .
Claim 8
Dependent Claim
31 words
The codepositing method according to claim 4 wherein at least the inside lower corners of the tank which extend in a longitudinal direction of the sparger pipe are bevelled or rounded.
Claim 9
Dependent Claim
68 words
The codepositing method according to claim 1 wherein said plating solution having said water-insoluble materials dispersed therein is a plating solution containing at least one-half mole of sulfamate ion per liter of the plating solution having a cationic fluorochemical surface-active agent or an amphoteric fluorochemical surface-active agent capable of exhibiting cationic nature in the bath added thereto, and having the water-insoluble organic high-molecular weight fluoride material dispersed therein.
Claim 10
Dependent Claim
41 words
The codepositing method according to claim 8 wherein said cationic fluorochemical surface-active agent or amphoteric fluorochemical surface-active agent capable of exhibiting cationic nature in the bath is added in an amount of 0.1 to 10 grams per liter of the bath.
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) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |