Patent US2581490A successfully refreshed from Google Patents.
US2581490A
Expired / Lapsed
US
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Electrolytic process of stripping metallic coatings from a ferrous metal base
Assignee: Motors Liquidation Co
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Filing: 1947-03-11
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Granted: 1952-01-08
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Expires: 1967-03-11
Abstract
No abstract record available.
Inventors
- 👤 Grayland T Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:03
CPC Classifications
C; C25; C25F; C25F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS OF ELECTROLYTICALLY STRIPPING A METAL COATING CONSISTING OF AT LEAST ONE METAL OF THE CLASS CONSISTING OF COPPER, NICKLE AND CHROMIUM FROM A FERROUS METAL BASE WITHOUT ETCHING THE BASE METAL WHICH COMPRISES, PASSING ELECTRIC CURRENT FROM SAID COATED BASE AS ANODE THROUGH A STRIPPING SOLUTION CONSISTING ESSENTIALLY OF ABOUT AT LEAST TWO POUNDS OF A COMMERCIAL ALKALI METAL NITRATE CONTAINING AN ALKALI METAL CHLORIDE AS A NORMAL IMPURITY, ABOUT ONE-EIGHTH OUNCE OF ALKALI CHLORIDE BEING PRESENT IN EACH TWO POUNDS OF SAID COMMERCIAL ALKALI NITRATE, ABOUT ONE-HALF OUNCE TO ABOUT FOUR OUNCES OF AN ALKALI METAL NITRITE AND ABOUT ONE-TWENTIETH TO ONE-HALF OUNCES OF AN ALKALI METAL HYDROXIDE PER GALLON OF WATER UNTIL SAID COATING IS STRIPPED FROM THE FERROUS METAL BASE, SAID SOLUTION TEMPERATURE BEING WITHIN THE RANGE OF ABOUT 100*-220* F. DURING SAID STRIPPING OPERATION.
Claim 2
Dependent Claim
140 words
A PROCESS OF ELECTROLYTICALLY STRIPPING A METAL COATING CONSISTING OF AT LEAST ONE METAL OF THE CLASS CONSISTING OF COPPER, NICKLE AND CHROMIUM FROM A FERROUS METAL BASE WITHOUT ETCHING THE BASE METAL WHICH COMPRISES, PASSING ELECTRIC CURRENT FROM SAID COATED BASE AS ANODE THROUGH A STRIPPING SOLUTION CONSISTING ESSENTIALLY OF ABOUT AT LEAST TWO POUNDS OF A COMMERCIAL ALKALI METAL NITRATE CONTAINING AN ALKALI METAL CHLORIDE AS A NORMAL IMPURITY, ABOUT ONE-EIGHTH OUNCE OF ALKALI CHLORIDE BEING PRESENT IN EACH TWO POUNDS OF SAID COMMERCIAL ALKALI NITRATE, ABOUT ONE-HALF OUNCE TO ABOUT FOUR OUNCES OF AN ALKALI METAL NITRITE AND ABOUT ONE-TWENTIETH TO ONE-HALF OUNCES OF AN ALKALI METAL HYDROXIDE PER GALLON OF WATER UNTIL SAID COATING IS STRIPPED FROM THE FERROUS METAL BASE, SAID SOLUTION TEMPERATURE BEING WITHIN THE RANGE OF ABOUT 100*-220* F. DURING SAID STRIPPING OPERATION.
References Cited (Backward Citations)
DE679931C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |