US3104177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphating process
Assignee: MAN-GILL CHEMICAL COMPANY AN OH CORP
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Filing: 1961-12-12
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Granted: 1963-09-17
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Expires: 1981-12-12
Abstract
No abstract record available.
Inventors
- 👤 Goldsmith Fred Corwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:46
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/22; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12583
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD FOR INHIBITING THE CORROSION OF A METAL ARTICLE SELECTED FROM THE CLASS CONSISTING OF FERROUS AND GALVANIZED METAL ARTICLES WHICH COMPRISES (A) PHOSPHATING SAID METAL ARTICLE WITH AN AQUEOUS PHOSPHATING SOLUTION HAVING A TOTAL ACIDITY WITHIN THE RANGE FROM ABOUT 5 TO ABOUT 100 POINTS AND CONTAINING AS ESSENTIAL INGREDIENTS FROM ABOUT 0.1 TO ABOUT 1.0 PERCENT OF ZINC ION; FROM ABOUT 0.25 TO ABOUT 2.0 PERCENT OF PHOSPHATE ION; FROM ABOUT 0.25 TO ABOUT 8.0 PERCENT OF NITRATE ION; AND FROM ABOUT 0.1 TO ABOUT 4.0 PERCENT OF A CATION SELECTED FROM THE GROUP CONSISTING OF LITHIUM, BERYLLIUM, MAGNESIUM, CALIUM, STRONTIUM, CADMIUM, AND BARIUM TO FORM THEREON AN INTEGRAL PHOSPHATE COATING OF AT LEAST ABOUT 25 MILLIGRAMS PER SQUARE FOOT OF SURRFACE AREA; AND THEN (B) RINSING SAID PHOSPHATED METAL ARTICLE WITH AN AQUEOUS SOLTION OF CALCIUM DICHROMATE DEVOID OF FREE ACID AND CONTAINING FROM ABOUT 0.01 TO ABOUT 0.4 PERCENT CRO3 AS CALCIUM DICHROMATE.
Claim 2
Independent Claim
158 words
A METHOD FOR INHIBITING THE CORROSION OF A METAL ARTICLE SELECTED FROM THE CLASS CONSISTING OF FERROUS AND GALVANIZED METAL ARTICLES WHICH COMPRISES (A) PHOSPHATING SAID METAL ARTICLE WITH AN AQUEOUS PHOSPHATING SOLUTION HAVING A TOTAL ACIDITY WITHIN THE RANGE FROM ABOUT 5 TO ABOUT 100 POINTS AND CONTAINING AS ESSENTIAL INGREDIENTS FROM ABOUT 0.1 TO ABOUT 1.0 PERCENT OF ZINC ION; FROM ABOUT 0.25 TO ABOUT 2.0 PERCENT OF PHOSPHATE ION; FROM ABOUT 0.25 TO ABOUT 8.0 PERCENT OF NITRATE ION; AND FROM ABOUT 0.1 TO ABOUT 4.0 PERCENT OF A CATION SELECTED FROM THE GROUP CONSISTING OF LITHIUM, BERYLLIUM, MAGNESIUM, CALIUM, STRONTIUM, CADMIUM, AND BARIUM TO FORM THEREON AN INTEGRAL PHOSPHATE COATING OF AT LEAST ABOUT 25 MILLIGRAMS PER SQUARE FOOT OF SURRFACE AREA; AND THEN (B) RINSING SAID PHOSPHATED METAL ARTICLE WITH AN AQUEOUS SOLTION OF CALCIUM DICHROMATE DEVOID OF FREE ACID AND CONTAINING FROM ABOUT 0.01 TO ABOUT 0.4 PERCENT CRO3 AS CALCIUM DICHROMATE.
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) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |