Patent US2493579A successfully refreshed from Google Patents.
US2493579A
Expired / Lapsed
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⏱️ 0.0 years remaining
Solution for anodic polishing of steel and iron articles
Assignee: Standard Steel Spring Co
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Filing: 1947-03-08
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Granted: 1950-01-03
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Expires: 1967-03-08
Abstract
No abstract record available.
Inventors
- 👤 Milton B Hammond
- 👤 Glade B Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:42
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SOLUTION FOR USE IN THE ELECTROLYTIC POLISHING OF STEEL AND IRON ARTICLES WHEREIN THE ARTICLE IS EMPLOYED AS AN ANODE, SAID SOLUTION CONSISTING ESSENTIALLY OF AND CONTAINING BY WEIGHT 55 TO 85% PHOSPHORIC ACID, 7 TO 30% WATER, 1 TO 15% OF A MEMBER OF THE CLASS CONSISTING OF TRI-ALKALI METAL PHOSPHATE, DI-ALKALI METAL PHOSPHATE, MONO-ALKALI METAL PHOSPHATE, AND PHOSPHORUS PENTOXIDE, AND AT LEAST 0.5% OF A SULPHATE OF THE CLASS CONSISTING OF ALKALI METAL SULPHATE AND AMMONIUM SULPHATE.
Claim 2
Dependent Claim
80 words
A SOLUTION FOR USE IN THE ELECTROLYTIC POLISHING OF STEEL AND IRON ARTICLES WHEREIN THE ARTICLE IS EMPLOYED AS AN ANODE, SAID SOLUTION CONSISTING ESSENTIALLY OF AND CONTAINING BY WEIGHT 55 TO 85% PHOSPHORIC ACID, 7 TO 30% WATER, 1 TO 15% OF A MEMBER OF THE CLASS CONSISTING OF TRI-ALKALI METAL PHOSPHATE, DI-ALKALI METAL PHOSPHATE, MONO-ALKALI METAL PHOSPHATE, AND PHOSPHORUS PENTOXIDE, AND AT LEAST 0.5% OF A SULPHATE OF THE CLASS CONSISTING OF ALKALI METAL SULPHATE AND AMMONIUM SULPHATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |