Patent US2542779A successfully refreshed from Google Patents.
US2542779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropolishing composition and process
Assignee: Columbus Metal Products Inc
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Filing: 1948-01-07
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Granted: 1951-02-20
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Expires: 1968-01-07
Abstract
No abstract record available.
Inventors
- 👤 William J Neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:05
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A NEW COMPOSITION OF MATTER USEFUL AS AN ELECTROLYTIC SOLUTION FOR THE ANODIC POLISHING OF METAL CONSISTING BY VOLUME OF A MIXTURE OF THE QUEIVALENT OF 45 TO 65% OF A 66* BAUME'' SULFURIC ACID; THE EQUIVALENT OF FROM 5 TO 20% OF A 26% AQUEOUS SOLUTION OF FLUOBORIC ACID; AND FROM 25 TO 55% WATER.
Claim 2
Dependent Claim
56 words
A NEW COMPOSITION OF MATTER USEFUL AS AN ELECTROLYTIC SOLUTION FOR THE ANODIC POLISHING OF METAL CONSISTING BY VOLUME OF A MIXTURE OF THE QUEIVALENT OF 45 TO 65% OF A 66* BAUME'' SULFURIC ACID; THE EQUIVALENT OF FROM 5 TO 20% OF A 26% AQUEOUS SOLUTION OF FLUOBORIC ACID; AND FROM 25 TO 55% WATER.
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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |