US2695872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic polishing method
Assignee: Armco Inc
•
Filing: 1948-12-15
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Granted: 1954-11-30
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Expires: 1968-12-15
Abstract
No abstract record available.
Inventors
- 👤 Espy Ronald Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:24
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN THE CONTROLLED POLISHING OF A STAINLESS STEEL PRODUCT TO ACHIEVE UNIFORM RATE OF METAL REMOVAL THE ART WHICH COMPRISES; IMMERSING THE PRODUCT TO BE POLISHED AND AN ELECTRODE SUBSTANTIALLY CONTAINING TANTALUM IN AN AQUEOUS ELECTROLYTIC POLISHING BATH CONSISTING ESSENTIALLY OF ALIPHATIC CARBOXYLIC ACID AND SULFURIC ACID; MAKING THE STAINLESS STEEL PRODUCT AND SAID ELECTRODE THE OPPOSING TERMINALS OF THE ELECTROLYTIC BATH; AND SUPPLYING ALTERNATING CURRENT TO THE BATH TERMINALS FOR POLISHING THE STEEL.
Claim 2
Dependent Claim
74 words
IN THE CONTROLLED POLISHING OF A STAINLESS STEEL PRODUCT TO ACHIEVE UNIFORM RATE OF METAL REMOVAL THE ART WHICH COMPRISES; IMMERSING THE PRODUCT TO BE POLISHED AND AN ELECTRODE SUBSTANTIALLY CONTAINING TANTALUM IN AN AQUEOUS ELECTROLYTIC POLISHING BATH CONSISTING ESSENTIALLY OF ALIPHATIC CARBOXYLIC ACID AND SULFURIC ACID; MAKING THE STAINLESS STEEL PRODUCT AND SAID ELECTRODE THE OPPOSING TERMINALS OF THE ELECTROLYTIC BATH; AND SUPPLYING ALTERNATING CURRENT TO THE BATH TERMINALS FOR POLISHING THE STEEL.
References Cited (Backward Citations)
FR556017A
Cited
US1788541A
Cited
US2335354A
Cited
US2424674A
Cited
US2390282A
Cited
US2442592A
Cited
US2582020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |