US2762732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution for and method of cleaning and coating metallic surfaces
Assignee: Parker Rust Proof Co
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Filing: 1951-11-19
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Granted: 1956-09-11
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Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Richard I Somers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:56
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/02; C23C22/04; C23C22/82; C23C22/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF TREATING THE SURFACE OF A METAL OF THE CLASS CONSISTING OF IRON, ALUMINUM AND ZINC AND THE ALLOYS THEREOF, AND CHEMICALLY COATED METALLIC SURFACES WHICH COMPRISES APPLYING TO THE SAID SURFACE, A SOLUTION CONTAINING AS ESSENTIAL INGREDIENTS 40 TO 90 PARTS BY VOLUME TERTIARY BUTYL ALCOHOL, 10 TO 60 PARTS BY VOLUME OF A HYDROCARBON SOLVENT, UP TO 30 PARTS BY VOLUME WATER, AND .025% TO 10% CHROMIC ACID BY WEIGHT OF THE TOTAL WEIGHT OF THE SOLUTION AND DRYING A FILM OF SAID SOLUTION UPON THE SURFACE.
Claim 2
Independent Claim
91 words
A METHOD OF TREATING THE SURFACE OF A METAL OF THE CLASS CONSISTING OF IRON, ALUMINUM AND ZINC AND THE ALLOYS THEREOF, AND CHEMICALLY COATED METALLIC SURFACES WHICH COMPRISES APPLYING TO THE SAID SURFACE, A SOLUTION CONTAINING AS ESSENTIAL INGREDIENTS 40 TO 90 PARTS BY VOLUME TERTIARY BUTYL ALCOHOL, 10 TO 60 PARTS BY VOLUME OF A HYDROCARBON SOLVENT, UP TO 30 PARTS BY VOLUME WATER, AND .025% TO 10% CHROMIC ACID BY WEIGHT OF THE TOTAL WEIGHT OF THE SOLUTION AND DRYING A FILM OF SAID SOLUTION UPON THE SURFACE.
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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |