US3213008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic polishing of stainless steel
Assignee: Ametek Inc
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Filing: 1961-06-14
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Granted: 1965-10-19
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Expires: 1981-06-14
Abstract
No abstract record available.
Inventors
- 👤 Sadi C Valentin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:34
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF ELECTROLYTICALLY POLISHING STAINLESS STEEL WHICH COMPRISES MAKING SUCH STAINLESS STEEL THE ANODE IN AN ELECTROLYTIC BATH AT A CURRENT DENSITY, TIME AND TEMPERATURE SO RELATED AS TO DISSOLVE AWAY THE SURFACE TO GIVE THE DESIRED SMOOTH SURFACE, SAID BATH CONSISTING ESSENTIALLY OF PHOSPHORIC ACID OF ABOUT 37% BY WEIGHT, SULFURIC ACID OF ABOUT 38% BY WEIGHT; WATER OF ABOUT 22% BY WEIGHT; CHROMIUM SULFATE IN THE RANGE OF ABOUT 1.1% B Y WEIGHT; FERROUS SULFATE IN THE RANGE OF ABOUT 1% BY WEIGHT; NICKEL SULFATE IN THE RANGE OF ABOUT 0.4% BY WEIGHT; AND ALUMINUM SULFATE IN THE RANGE OF ABOUT 0.2% BY WEIGHT.
Claim 2
Independent Claim
107 words
THE METHOD OF ELECTROLYTICALLY POLISHING STAINLESS STEEL WHICH COMPRISES MAKING SUCH STAINLESS STEEL THE ANODE IN AN ELECTROLYTIC BATH AT A CURRENT DENSITY, TIME AND TEMPERATURE SO RELATED AS TO DISSOLVE AWAY THE SURFACE TO GIVE THE DESIRED SMOOTH SURFACE, SAID BATH CONSISTING ESSENTIALLY OF PHOSPHORIC ACID OF ABOUT 37% BY WEIGHT, SULFURIC ACID OF ABOUT 38% BY WEIGHT; WATER OF ABOUT 22% BY WEIGHT; CHROMIUM SULFATE IN THE RANGE OF ABOUT 1.1% B Y WEIGHT; FERROUS SULFATE IN THE RANGE OF ABOUT 1% BY WEIGHT; NICKEL SULFATE IN THE RANGE OF ABOUT 0.4% BY WEIGHT; AND ALUMINUM SULFATE IN THE RANGE OF ABOUT 0.2% BY WEIGHT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |