US3060071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating zinc castings
Assignee: Allied Res Products Inc
•
Filing: 1957-08-06
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Granted: 1962-10-23
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Expires: 1977-08-06
Abstract
No abstract record available.
Inventors
- 👤 David H Kinder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:28
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37; C23F; C23F3/00; C23F3/04; C23F3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE PROCESS OF TREATING ZINC CASTINGS COMPRISING IMMERSING THE SAME IN AN AQUEOUS ACIDIC CHROMATE BATH CONTAINING CRO3, AT LEAST ABOUT 30G./1., AND ABOUT 5 TO 60 ML./1. HNO3, 0 TO 100 ML./1 HAC, 2 TO 10 ML./1. H2SO4 AND 4 TO 50G./1. OF A SOLUBLE FLUORIDE, FOR FROM 5 SECONDS TO 2 MINUTES WITH THE BATH AT A TEMPERATURE BETWEENEEN 80*F. AND 160*F.
Claim 2
Dependent Claim
64 words
THE PROCESS OF TREATING ZINC CASTINGS COMPRISING IMMERSING THE SAME IN AN AQUEOUS ACIDIC CHROMATE BATH CONTAINING CRO3, AT LEAST ABOUT 30G./1., AND ABOUT 5 TO 60 ML./1. HNO3, 0 TO 100 ML./1 HAC, 2 TO 10 ML./1. H2SO4 AND 4 TO 50G./1. OF A SOLUBLE FLUORIDE, FOR FROM 5 SECONDS TO 2 MINUTES WITH THE BATH AT A TEMPERATURE BETWEENEEN 80*F. AND 160*F.
References Cited (Backward Citations)
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Cited
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US2614913A
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US2796372A
Cited
US2904413A
Cited
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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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |