US2850415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating metals with ferrate solution
Assignee: EIDP Inc
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Filing: 1954-09-21
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Granted: 1958-09-02
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Expires: 1974-09-21
Abstract
No abstract record available.
Inventors
- 👤 Harrison John Rufford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:30
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE METHOD OF IMPARTING CORROSION RESISTANCE TO AND IMPROVING THE DYE-RECEPTIVE PROPERTIES OF A METAL SELECTED FROM THE GROUP CONSISTING OF FERROUS METALS AND ZINC WHICH COMPRISES SEQUENTIALLY CONTACTING SAID METAL WITH AN AQUEOUS SOLUTION OF A METALLIC FERRATE AT A TEMPERATURE NO GREATER THAN ABOUT 50*C. AND THEN WITH AN AQUEOUS SOLUTION CONTAINING ABOUT 1-5% BY WEIGHT OF A MEMBER OF THE GROUP CONSISTING OF SILICATES, DICHROMATES AND MIXTURES THEREOF WITH EACH OTHER AT A TEMPERATURE NOT ABOVE ABOUT 140*C.
Claim 2
Independent Claim
81 words
THE METHOD OF IMPARTING CORROSION RESISTANCE TO AND IMPROVING THE DYE-RECEPTIVE PROPERTIES OF A METAL SELECTED FROM THE GROUP CONSISTING OF FERROUS METALS AND ZINC WHICH COMPRISES SEQUENTIALLY CONTACTING SAID METAL WITH AN AQUEOUS SOLUTION OF A METALLIC FERRATE AT A TEMPERATURE NO GREATER THAN ABOUT 50*C. AND THEN WITH AN AQUEOUS SOLUTION CONTAINING ABOUT 1-5% BY WEIGHT OF A MEMBER OF THE GROUP CONSISTING OF SILICATES, DICHROMATES AND MIXTURES THEREOF WITH EACH OTHER AT A TEMPERATURE NOT ABOVE ABOUT 140*C.
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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |