US2645635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of regenerating electrolytic polishing solutions
Assignee: Shwayder Brothers Inc
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Filing: 1949-06-27
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Granted: 1953-07-14
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Expires: 1969-06-27
Abstract
No abstract record available.
Inventors
- 👤 Harold F Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
C; C25; C25F; C25F7/00; C25F7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A METHOD OF REGENERATING AN ELECTROLYTIC POLISHING SOLUTION INITIALLY COMPRISING FROM 35% TO 70* OF ORTHOPHOSPHORIC ACID, FROM 8% TO 64% OF AT LEAST ONE WATER-SOLUBLE POLYHYDRIC ALCOHOL, FROM 1% TO 12% OF A MONO-HYDROXY MONO-CARBOXYLIC ACID, FROM 5% TO 30% OF WATER, AND FROM 0 TO 10% OF AN ADDITION AGENT ADAPTED TO INCREASE THE BRIGHTNESS OF AN ARTICLE POLISHED IN SAID SOLUTION, SAID SOLUTION HAVING BEEN UTILIZED IN ELECTROLYTIC POLISHING, AND, AS A RESULT, HAVING DISSOLVED THEREIN AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, ZINC, NICKEL, AND COBALT WHICH METHOD COMPRISES ADDING TO SAID SOLUTION A REAGENT SELECTED FROM THE GROUP WHICH CONSISTS OF OXALIC ACID, CALCIUM OXALATE, BARIUM OXALATE, METHYL OXALATE, ETHYL OZALATE, GLYCOL OXLATE AND GLYCERYL OXLATE, SAID REAGENT BEING ADDED IN AN AMOUNT SUFFICIENT TO PRECIPITATE AT LEAST A PORTION OF THE DISSOLVED COPPER, ZINC, NICKEL AND COBALT AND LESS THAN THE AMOUNT WHICH WILL RESULT IN FREE OXALIC ACID BEING PRESENT IN THE SOLUTION WHEN UTILIZED AGAIN.
Claim 2
Independent Claim
167 words
A METHOD OF REGENERATING AN ELECTROLYTIC POLISHING SOLUTION INITIALLY COMPRISING FROM 35% TO 70* OF ORTHOPHOSPHORIC ACID, FROM 8% TO 64% OF AT LEAST ONE WATER-SOLUBLE POLYHYDRIC ALCOHOL, FROM 1% TO 12% OF A MONO-HYDROXY MONO-CARBOXYLIC ACID, FROM 5% TO 30% OF WATER, AND FROM 0 TO 10% OF AN ADDITION AGENT ADAPTED TO INCREASE THE BRIGHTNESS OF AN ARTICLE POLISHED IN SAID SOLUTION, SAID SOLUTION HAVING BEEN UTILIZED IN ELECTROLYTIC POLISHING, AND, AS A RESULT, HAVING DISSOLVED THEREIN AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, ZINC, NICKEL, AND COBALT WHICH METHOD COMPRISES ADDING TO SAID SOLUTION A REAGENT SELECTED FROM THE GROUP WHICH CONSISTS OF OXALIC ACID, CALCIUM OXALATE, BARIUM OXALATE, METHYL OXALATE, ETHYL OZALATE, GLYCOL OXLATE AND GLYCERYL OXLATE, SAID REAGENT BEING ADDED IN AN AMOUNT SUFFICIENT TO PRECIPITATE AT LEAST A PORTION OF THE DISSOLVED COPPER, ZINC, NICKEL AND COBALT AND LESS THAN THE AMOUNT WHICH WILL RESULT IN FREE OXALIC ACID BEING PRESENT IN THE SOLUTION WHEN UTILIZED AGAIN.
References Cited (Backward Citations)
US2294227A
Cited
GB618120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |