US3879276A
Expired / Lapsed
US
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Electrophoretic deposition of selenium
Assignee: International Standard Electric Corp
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Filing: 1974-04-10
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Granted: 1975-04-22
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Expires: 1994-04-10
Abstract
Abstract Electrophoretic deposition of selenium is achieved by preparing a SOL from selenium dioxide solution and benzaldehyde and then diluting with a solvent.
Inventors
- 👤 John D Underwood
- 👤 Philip F E Dutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:00
CPC Classifications
C; C25; C25D; C25D13/00; C25D13/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
74 words
A method of electrophoretically depositing a colloidal material, which material has a soluble oxidized form comprising the steps of: forming an acid solution of said oxidized form; adding a reducing agent having a low reduction potential in acid solution; and applying an electric field via electrodes to said solution, wherein application of the electric field causes an increase in pH resulting in a reduction of said colloidal material which material migrates to a cathode.
Claim 2
Independent Claim
74 words
A method of electrophoretically depositing a colloidal material, which material has a soluble oxidized form comprising the steps of: forming an acid solution of said oxidized form; adding a reducing agent having a low reduction potential in acid solution; and applying an electric field via electrodes to said solution, wherein application of the electric field causes an increase in pH resulting in a reduction of said colloidal material which material migrates to a cathode.
Claim 3
Independent Claim
56 words
A METHOD OF ELECTROPHORETICALLY DEPOSITING SELENIUM COMPRISING THE STEPS OF: ADDING AN AROMATIC REDUCING AGENT TO A CONCENTRATED AQUEOUS SOLUTION OF SELENIUM DIOXIDE; DILUTING SAID SOLUTION WITH A SOLVENT OTHER THAN WATER; ADDING A TRACE OF SELENIC ACID; AND APPLYING AN ELECTRIC POTENTIAL BETWEEN ELECTRODES IMMERSED IN THE DILUTED SOLUTION TO DEPOSIT SELENIUM AT A CATHODE.
Claim 4
Independent Claim
56 words
A METHOD OF ELECTROPHORETICALLY DEPOSITING SELENIUM COMPRISING THE STEPS OF: ADDING AN AROMATIC REDUCING AGENT TO A CONCENTRATED AQUEOUS SOLUTION OF SELENIUM DIOXIDE; DILUTING SAID SOLUTION WITH A SOLVENT OTHER THAN WATER; ADDING A TRACE OF SELENIC ACID; AND APPLYING AN ELECTRIC POTENTIAL BETWEEN ELECTRODES IMMERSED IN THE DILUTED SOLUTION TO DEPOSIT SELENIUM AT A CATHODE.
Claim 5
Independent Claim
56 words
A method of electrophoretically depositing selenium comprising the steps of: adding an aromatic reducing agent to a concentrated aqueous solution of selenium dioxide; diluting said solution with a solvent other than water; adding a trace of selenic acid; and applying an electric potential between electrodes immersed in the diluted solution to deposit selenium at a cathode.
Claim 6
Independent Claim
56 words
A method of electrophoretically depositing selenium comprising the steps of: adding an aromatic reducing agent to a concentrated aqueous solution of selenium dioxide; diluting said solution with a solvent other than water; adding a trace of selenic acid; and applying an electric potential between electrodes immersed in the diluted solution to deposit selenium at a cathode.
Claim 7
Dependent Claim
12 words
A method according to claim 2, wherein said reducing agent is benzaldehyde.
Claim 8
Dependent Claim
12 words
A method according to claim 2, wherein said reducing agent is cinamaldehyde.
Claim 9
Dependent Claim
12 words
A method according to claim 2, wherein said reducing agent is anisaldehyde.
Claim 10
Dependent Claim
11 words
A method according to claim 2, wherein said solvent is methanol.
Claim 11
Dependent Claim
18 words
A method according to claim 2, wherein said electrophoretic deposition is performed at a temperature of approximately 110*C.
Claim 12
Independent Claim
71 words
A method of electrophoretically depositing selenium comprising the steps of: forming a concentrated selenous acid solution coating 1 mole of selenous acid (H2SeO3); adding 2 moles of benzaldehyde and 1 mole of solvent having a high dielectric constant; diluting the solution with further solvent; adding a trace of selenic acid (H2SeO4); and applying an electric field to the solution via electrodes to deposit a selenium at a cathode from the solution.
Claim 13
Independent Claim
71 words
A method of electrophoretically depositing selenium comprising the steps of: forming a concentrated selenous acid solution coating 1 mole of selenous acid (H2SeO3); adding 2 moles of benzaldehyde and 1 mole of solvent having a high dielectric constant; diluting the solution with further solvent; adding a trace of selenic acid (H2SeO4); and applying an electric field to the solution via electrodes to deposit a selenium at a cathode from the solution.
Claim 14
Dependent Claim
19 words
A method according to claim 8, wherein said selenous acid solution is prepared by dissolving selenium dioxide in water.
Claim 15
Independent Claim
49 words
A method of electrophoretically depositing selenium comprising the steps of: diluting 0.5 mole selenous acid (H2SeO3) with 500 mls methanol; adding 0.25 mole benzaldehyde and a trace of selenic acid (H2SeO4); and applying an electric field between electrodes immersed in the solution to deposit selenium therefrom at a cathode.
Claim 16
Independent Claim
49 words
A method of electrophoretically depositing selenium comprising the steps of: diluting 0.5 mole selenous acid (H2SeO3) with 500 mls methanol; adding 0.25 mole benzaldehyde and a trace of selenic acid (H2SeO4); and applying an electric field between electrodes immersed in the solution to deposit selenium therefrom at a cathode.
References Cited (Backward Citations)
US2576129A
Cited
US3783025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |