US2847317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanadium-bearing ceramic pigment
Assignee: B F Drakenfeld & Co Inc
•
Filing: 1956-07-05
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Granted: 1958-08-12
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Expires: 1976-07-05
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Carnahan
- 👤 Edwin H Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0009; C01; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A METHOD OF PREPARING A VANADIUM-BEARING PIGMENT FOR COLORING CERAMIC ARTICLES WHERE A MIXTURE OF PIGMENT-FORMING MATERIALS IN AMOUNTS TO FORM A PIGMENT AND INCLUDING VANADIUM COMPOUND IS CALCULATED AND PRODUCES A CALCINED PIGMENT CONTAINING AN UNCOMBINED OXIDE OF VANADIUM, AND THE RESULTANT CALCINED PIGMENT IS GROUND IN WATER AND FILTERED, THAT STEP COMPRISING INCORPORATING IN SAID CALCINED PIGMENT AN ALKALINE-REACTING METAL COMPOUND IN AN AMOUNT SUFFICIENT TO REACT COMPLETELY, IN THE PRESENCE OF WATER, WITH SAID UNCOMBINED VANADIUM OXIDE IN SAID CALCINE.
Claim 2
Dependent Claim
84 words
IN A METHOD OF PREPARING A VANADIUM-BEARING PIGMENT FOR COLORING CERAMIC ARTICLES WHERE A MIXTURE OF PIGMENT-FORMING MATERIALS IN AMOUNTS TO FORM A PIGMENT AND INCLUDING VANADIUM COMPOUND IS CALCULATED AND PRODUCES A CALCINED PIGMENT CONTAINING AN UNCOMBINED OXIDE OF VANADIUM, AND THE RESULTANT CALCINED PIGMENT IS GROUND IN WATER AND FILTERED, THAT STEP COMPRISING INCORPORATING IN SAID CALCINED PIGMENT AN ALKALINE-REACTING METAL COMPOUND IN AN AMOUNT SUFFICIENT TO REACT COMPLETELY, IN THE PRESENCE OF WATER, WITH SAID UNCOMBINED VANADIUM OXIDE IN SAID CALCINE.
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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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |