US2565189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electropolishing steel
Assignee: EIDP Inc
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Filing: 1949-03-15
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Granted: 1951-08-21
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Expires: 1969-03-15
Abstract
No abstract record available.
Inventors
- 👤 Christian J Wernlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:24
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE PROCESS FOR ELECTROPOLISHING METAL ARTICLES SELECTED FROM THE GROUP CONSISTING OF MALLEABLE IRON, STEELS, COPPER, BRASS, ALUMINUM AND ELECTROLYTICALLY DEPOSITED CHROMIUM WHICH COMPRISES ANODICALLY TREATING SAID ARTICLES IN AN ELECTROLYTE CONSISTING OF 0.01 TO 30% BY WEIGHT OF WATER AND THE HYDROGEN FLUORIDE SALT OF AN ORGANIC NITROGEN BASE CAPABLE OF REACTING WITH HYDROGEN FLUORIDE TO FORM A SALT WHICH IS LIQUID IN THE PRESENCE OF 0.01 TO ABOUT 30% BY WEIGHT OF WATER AT A TEMPERATURE BELOW ITS DECOMPOSITION TEMPERATURE, SAID BASE BEING SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXYLAMINE, THE HETEROCYCLIC ORGANIC BASES AND AMINES HAVING THE TYPE FORMULA:
Claim 2
Dependent Claim
102 words
THE PROCESS FOR ELECTROPOLISHING METAL ARTICLES SELECTED FROM THE GROUP CONSISTING OF MALLEABLE IRON, STEELS, COPPER, BRASS, ALUMINUM AND ELECTROLYTICALLY DEPOSITED CHROMIUM WHICH COMPRISES ANODICALLY TREATING SAID ARTICLES IN AN ELECTROLYTE CONSISTING OF 0.01 TO 30% BY WEIGHT OF WATER AND THE HYDROGEN FLUORIDE SALT OF AN ORGANIC NITROGEN BASE CAPABLE OF REACTING WITH HYDROGEN FLUORIDE TO FORM A SALT WHICH IS LIQUID IN THE PRESENCE OF 0.01 TO ABOUT 30% BY WEIGHT OF WATER AT A TEMPERATURE BELOW ITS DECOMPOSITION TEMPERATURE, SAID BASE BEING SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXYLAMINE, THE HETEROCYCLIC ORGANIC BASES AND AMINES HAVING THE TYPE FORMULA:
References Cited (Backward Citations)
US2040618A
Cited
US2411410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |