US3147153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for providing a chromate coating on zinc and cadmium surface
Assignee: M&T Chemicals Inc
•
Filing: 1960-12-09
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Granted: 1964-09-01
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Expires: 1980-12-09
Abstract
No abstract record available.
Inventors
- 👤 Brian W Harris
- 👤 Jr Edgar J Seyb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:49
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR PROVIDING A CORROSION RESISTANT CHROMATE COATING ON ZINC AND CADMIUM SURFACED METAL COMPRISING DIPPING SAID METAL IN CHROMATING SOLUTION CONTAINING BETWEEN 0.5 G./L. AND 5 G./L. OF CHROMIC ACID AND SUFFICIENT SULFATE AND NITRATE IONS TO GIVE A CHROMIC ACID/ SULFATE RATIO OF FROM ABOUT 0.5 TO 2, AND A CHROMIC ACID/ NITRATE RATIO OF FROM ABOUT 0.05 TO 0.2, WITHDRAWING SAID METAL AND THEN IMMERSING SAID METAL IN A DYE SOLUTION CONTAINING BETWEEN 0.4 G./L. AND 1 G./L. OF DYE, BETWEEN 0.2 G./L. AND 20 G./L. OF CHROMIOC ACID, HAVING A PH BETWEEN 4.5 AND 7 AND A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 65*C., UNTIL THE DESIRED COLOR IS OBTAINED.
Claim 2
Dependent Claim
114 words
A PROCESS FOR PROVIDING A CORROSION RESISTANT CHROMATE COATING ON ZINC AND CADMIUM SURFACED METAL COMPRISING DIPPING SAID METAL IN CHROMATING SOLUTION CONTAINING BETWEEN 0.5 G./L. AND 5 G./L. OF CHROMIC ACID AND SUFFICIENT SULFATE AND NITRATE IONS TO GIVE A CHROMIC ACID/ SULFATE RATIO OF FROM ABOUT 0.5 TO 2, AND A CHROMIC ACID/ NITRATE RATIO OF FROM ABOUT 0.05 TO 0.2, WITHDRAWING SAID METAL AND THEN IMMERSING SAID METAL IN A DYE SOLUTION CONTAINING BETWEEN 0.4 G./L. AND 1 G./L. OF DYE, BETWEEN 0.2 G./L. AND 20 G./L. OF CHROMIOC ACID, HAVING A PH BETWEEN 4.5 AND 7 AND A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 65*C., UNTIL THE DESIRED COLOR IS OBTAINED.
References Cited (Backward Citations)
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |