US3011958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodic treatment of zinc and zinc-base alloys
Assignee: Teck Metals Ltd
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Filing: 1960-04-04
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Granted: 1961-12-05
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Arnold G White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:43
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
AN ANODIC PROCESS FOR TREATING A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC-BASE ALLOYS WHICH COMPRISES SUBJECTING TO ELECTROYLISIS AN AQUEOUS SOLUTION WHICH CONSISTS ESSENTIALLY OF CHROMATE RADICAL IN AMOUNT OF FROM ABOUT 0.15 TO ABOUT 0.75 MOLE PER LITRE, PHOSPHATE RADICAL IN AMOUNT OF FROM ABOUT 0.40 TO ABOUT 1.5 MOLES PER LITRE, AND FLUORIDE RADICAL IN AMOUNT OF FROM ABOUT 0.40 TO ABOUT 3.00 MOLES PER LITRE, SAID RADICALS BEING PROVIDED BY COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF CHROMIC ACID, PHOSPHORIC ACID, HYDROFLUORIC ACID, AND THE AMMONIUM SALTS THEREOF, AND WHICH HAS A PH VALUE OF FROM ABOUT PH 6 TO ABOUT PH 8 ABOUT AND WHICH IS SUBSTANTIALLY FREE FROM METAL IONS, USING IN SAID ELECTROLYSIS AT LEAST ONE ELECTRODE HAVING EXPOSED SURFACES FORMED OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC-BASE ALLOYS AND CONTINUING SAID ELECTROLYSIS WITH INCREASING VOLTAGE UNTIL THE VOLTAGE RISES TO A LEVELLING VALUE OF AT LEAST 200 VOLTS.
Claim 2
Dependent Claim
164 words
AN ANODIC PROCESS FOR TREATING A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC-BASE ALLOYS WHICH COMPRISES SUBJECTING TO ELECTROYLISIS AN AQUEOUS SOLUTION WHICH CONSISTS ESSENTIALLY OF CHROMATE RADICAL IN AMOUNT OF FROM ABOUT 0.15 TO ABOUT 0.75 MOLE PER LITRE, PHOSPHATE RADICAL IN AMOUNT OF FROM ABOUT 0.40 TO ABOUT 1.5 MOLES PER LITRE, AND FLUORIDE RADICAL IN AMOUNT OF FROM ABOUT 0.40 TO ABOUT 3.00 MOLES PER LITRE, SAID RADICALS BEING PROVIDED BY COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF CHROMIC ACID, PHOSPHORIC ACID, HYDROFLUORIC ACID, AND THE AMMONIUM SALTS THEREOF, AND WHICH HAS A PH VALUE OF FROM ABOUT PH 6 TO ABOUT PH 8 ABOUT AND WHICH IS SUBSTANTIALLY FREE FROM METAL IONS, USING IN SAID ELECTROLYSIS AT LEAST ONE ELECTRODE HAVING EXPOSED SURFACES FORMED OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND ZINC-BASE ALLOYS AND CONTINUING SAID ELECTROLYSIS WITH INCREASING VOLTAGE UNTIL THE VOLTAGE RISES TO A LEVELLING VALUE OF AT LEAST 200 VOLTS.
References Cited (Backward Citations)
DE637988C
Cited
US2778789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |