US2744555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of simultaneously phosphating and cleaning metal surfaces and composition therefor
Assignee: Parker Rust Proof Co
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Filing: 1951-03-31
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Granted: 1956-05-08
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Expires: 1971-03-31
Abstract
No abstract record available.
Inventors
- 👤 Nicholson Andrew
- 👤 Wilkinson Cyril Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:55
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C11; C11D; C11D3/00; C11D3/43; C11D7/00; C11D7/02; C11D7/04; C11D7/10; C11D7/16; C23G; C23G5/00; C23G5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR SIMULTANEOUSLY CLEANING AND PRODUCING A PHOSPHATE COATING ON THE SURFACES OF METAL OF THE GROUP CONSISTING OF IRON AND ZINC AND THEIR ALLOYS WHICH COMPRISES THE STEPS OF (1) APPLYING TO THE SURFACE AN AQUEOUS SOLUTION OF AN ACIDIC PHOSPHATE OF AN ALKALI METAL IN THE PRESENCE OF AN ACCELERATOR HAVING AN EFFECT ON THE COATING ACTION SUBSTANTIALLY EQUAL TO THAT OF ABOUT .5 PERCENT TO 4 PERCENT CHLORATE, 1 PERCENT TO 10 PERCENT OF A HYDROCARBON SOLVENT, AND A NON-IONIC OIL-IN-WATER EMULSIFYING AGENT OF THE PHOLYOXYETHYLENE TYPE HAVING 3 TO 25 POLYOXYETHYLENE GROUPS THEREIN IN AN AMOUNT SUFFICIENT TO FORM A STABLE EMULSION OF SAID SOLVENT, SAID SOLUTION HAVING A PH OF FROM 3.5 TO 5.8 AND CONTINUING THE APPLICATION UNTIL A COATING RESULTS, AND (2) RINSING THE COATED SURFACE WITH A DILUTE SOLUTION OF CHROMIC ACID.
Claim 2
Dependent Claim
141 words
A PROCESS FOR SIMULTANEOUSLY CLEANING AND PRODUCING A PHOSPHATE COATING ON THE SURFACES OF METAL OF THE GROUP CONSISTING OF IRON AND ZINC AND THEIR ALLOYS WHICH COMPRISES THE STEPS OF (1) APPLYING TO THE SURFACE AN AQUEOUS SOLUTION OF AN ACIDIC PHOSPHATE OF AN ALKALI METAL IN THE PRESENCE OF AN ACCELERATOR HAVING AN EFFECT ON THE COATING ACTION SUBSTANTIALLY EQUAL TO THAT OF ABOUT .5 PERCENT TO 4 PERCENT CHLORATE, 1 PERCENT TO 10 PERCENT OF A HYDROCARBON SOLVENT, AND A NON-IONIC OIL-IN-WATER EMULSIFYING AGENT OF THE PHOLYOXYETHYLENE TYPE HAVING 3 TO 25 POLYOXYETHYLENE GROUPS THEREIN IN AN AMOUNT SUFFICIENT TO FORM A STABLE EMULSION OF SAID SOLVENT, SAID SOLUTION HAVING A PH OF FROM 3.5 TO 5.8 AND CONTINUING THE APPLICATION UNTIL A COATING RESULTS, AND (2) RINSING THE COATED SURFACE WITH A DILUTE SOLUTION OF CHROMIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |