US2615840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic method to remove rust
Assignee: Individual
•
Filing: 1949-04-13
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Granted: 1952-10-28
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Expires: 1969-04-13
Abstract
No abstract record available.
Inventors
- 👤 Chapman Alfred Arthur Grahame
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:31
CPC Classifications
C; C25; C25F; C25F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF FREEING METALS FROM RUST, CORROSION AND THE LIKE WHICH COMPRISES IMMERSING A METAL ARTICLE IN AN ELECTROLYTIC BATH AND PASSING AN ELECTRIC CURRENT BETWEEN AN ANODE IN THE BATH AND THE ARTICLE AS A CATHODE, SAID BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF THE FOLLOWING COMPOUNDS: ALKALI METAL HYDROXIDE 2 TO 3 1/2 LBS./GAL. ALKALI METAL CYANIDE 2 TO 4 OZ./GAL. ALKALI METAL CHLORIDE 1 TO 8 OZ./GAL. ALKALI METAL FLUORIDE 1/4 TO 2 OZ./GAL. WETTING AGENT 1/16 TO 14 OZ./GAL. AND A MEMBER OF THE CLASS CONSISTING OF ALKALI METAL METASILICATE AND ALUMINATE, 2 TO 4 OZ./GAL.
Claim 2
Independent Claim
102 words
A METHOD OF FREEING METALS FROM RUST, CORROSION AND THE LIKE WHICH COMPRISES IMMERSING A METAL ARTICLE IN AN ELECTROLYTIC BATH AND PASSING AN ELECTRIC CURRENT BETWEEN AN ANODE IN THE BATH AND THE ARTICLE AS A CATHODE, SAID BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION OF THE FOLLOWING COMPOUNDS: ALKALI METAL HYDROXIDE 2 TO 3 1/2 LBS./GAL. ALKALI METAL CYANIDE 2 TO 4 OZ./GAL. ALKALI METAL CHLORIDE 1 TO 8 OZ./GAL. ALKALI METAL FLUORIDE 1/4 TO 2 OZ./GAL. WETTING AGENT 1/16 TO 14 OZ./GAL. AND A MEMBER OF THE CLASS CONSISTING OF ALKALI METAL METASILICATE AND ALUMINATE, 2 TO 4 OZ./GAL.
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |