US2704273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for chromium electrodeposition
Assignee: Individual
•
Filing: 1951-11-10
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Granted: 1955-03-15
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Expires: 1971-11-10
Abstract
No abstract record available.
Inventors
- 👤 Yoshida Tadashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:49
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; C25D3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A PROCESS FOR THE ELECTRODEPOSITION OF METALLIC CHROMIUM WHICH COMPRISES CAUSING ELECTRODEPOSITION OF METALLIC CHROMIUM FROM A ELECTROYTIC BATH CONSISTING OF AN AQUEOUS SOLUTION CONTAINING PER LITER 41 TO 73 GRAMS TRIVALVENT CHROMIUM, 180 TO 264 GRAMS FREE UREA, 90 TO 123 GRAMS OF A SUBSTANCES SELECTED FROM THE GROUPS CONSISTING OF AMMONIUM, AMMONIUM AND POTASSIUM AMMONIUM AND SODIUM, AND AMMONIUM, POTASSIUM AND SODIUM, THE AMOUNT OF POTASSIUM AND SODIUM WHEN INCLUDED, NOT EXCEEDING 55 GRAMS, AND SULPHAR RDICAL IN AN AMOUNT AT LEAST STOCICHIOMETRICALLY EQUIVALENT TO THE AMOUNT OF AMMONIUM RADICAL, POTASSIUM AND SODIUM WHEN INCLUDED, AND TRIVALENT CHROMIUM, SAID SOLUTION HAVING BEEN AGED AT A CONSTANT ELECTROLYTIC TEMPERATURE TO CAUSE AN EQUILIBRIUM IN THE STATE OF THE COMPLEXTIONS IN THE SOLUTION AT THE TEMPERATURE OF ELECTGROLYSIS, SAID TEMPERATURE BEING BETWEEN 25* AND 55* C., WITH AN ANODE CONSISTING OF 4 TO 12% TIN, 1 TO 10% SILVER, 0.1 TO 2.5% COBALT AND THE BALANCE LEAD.
Claim 2
Dependent Claim
157 words
A PROCESS FOR THE ELECTRODEPOSITION OF METALLIC CHROMIUM WHICH COMPRISES CAUSING ELECTRODEPOSITION OF METALLIC CHROMIUM FROM A ELECTROYTIC BATH CONSISTING OF AN AQUEOUS SOLUTION CONTAINING PER LITER 41 TO 73 GRAMS TRIVALVENT CHROMIUM, 180 TO 264 GRAMS FREE UREA, 90 TO 123 GRAMS OF A SUBSTANCES SELECTED FROM THE GROUPS CONSISTING OF AMMONIUM, AMMONIUM AND POTASSIUM AMMONIUM AND SODIUM, AND AMMONIUM, POTASSIUM AND SODIUM, THE AMOUNT OF POTASSIUM AND SODIUM WHEN INCLUDED, NOT EXCEEDING 55 GRAMS, AND SULPHAR RDICAL IN AN AMOUNT AT LEAST STOCICHIOMETRICALLY EQUIVALENT TO THE AMOUNT OF AMMONIUM RADICAL, POTASSIUM AND SODIUM WHEN INCLUDED, AND TRIVALENT CHROMIUM, SAID SOLUTION HAVING BEEN AGED AT A CONSTANT ELECTROLYTIC TEMPERATURE TO CAUSE AN EQUILIBRIUM IN THE STATE OF THE COMPLEXTIONS IN THE SOLUTION AT THE TEMPERATURE OF ELECTGROLYSIS, SAID TEMPERATURE BEING BETWEEN 25* AND 55* C., WITH AN ANODE CONSISTING OF 4 TO 12% TIN, 1 TO 10% SILVER, 0.1 TO 2.5% COBALT AND THE BALANCE LEAD.
References Cited (Backward Citations)
US2419722A
Cited
US2340400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |