US3025178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blue pigments
Assignee: Harshaw Chemical Co
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Filing: 1959-12-31
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Granted: 1962-03-13
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Expires: 1979-12-31
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Seabright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:56
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0009; C09C1/0012; C01; C01P; C01P2002/00; C01P2002/80; C01P2002/84; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
A METHOD OF PREPARING A BLUE CERAMIC PIGMENT COMPRISING CALCINING SUBSTANTIALLY OUT OF CONTACT WITH AIR A MIXTURE OF COMPOUNDS INCLUDING FROM 35% BY WEIGHT TO 80% BY WEIGHT EXPRESSED AT ZRO2 OF AT LEAST ONE COMPOUND CAPABLE OF YIELDING ZIRCONIUM OXIDE, FROM 1% BY WEIGHT TO 12% BY WEIGHT EXPRESSED AS V2O5 OF AT LEAST ONE COMPOUND CAPABLE OF YIELDING VANADIUM PENTOXIDE FROM 10% BY WEIGHT TO 55% BY WEIGHT EXPRESSED AS SIO2 OF AT LEAST ONE COMPOUND CAPABLE OF YIELDING SILICON OXIDE, A SOURCE OF ALKALI METAL IONS PRESENT IN AMOUNT SUCH THAT THERE IS 0.25% BY WEIGHT TO 8% BY WEIGHT OF ALKALI METAL IONS PRESENT IN THE CALCINATION MIXTURE, A SOURCE OF FLUORIDE IONS PRESENT IN THE AMOUNTS SUCH THAT THERE IS 0.25% BY WEIGHT TO 5% BY WEIGHT OF FLUORIDE IONS PRESENT IN THE CALCINATION MIXTURE, OF A SOURCE OF HALIDE, IONS SELECTED FROM THE GROUP CONSISTING OF CHLORIDE AND BROMIDE IONS PRESENT IN AMOUNTS SUCH THAT THERE IS 0.25% BY WEIGHT TO 8% BY WEIGHT OF HALIDE IONS OTHER THAN FLUORIDE IONS PRESENT IN THE CALCINATION MIXTURE AT A CALCINATION TEMPERATURE OF FROM 650* C. TO 1000* C.
Claim 2
Independent Claim
194 words
A METHOD OF PREPARING A BLUE CERAMIC PIGMENT COMPRISING CALCINING SUBSTANTIALLY OUT OF CONTACT WITH AIR A MIXTURE OF COMPOUNDS INCLUDING FROM 35% BY WEIGHT TO 80% BY WEIGHT EXPRESSED AT ZRO2 OF AT LEAST ONE COMPOUND CAPABLE OF YIELDING ZIRCONIUM OXIDE, FROM 1% BY WEIGHT TO 12% BY WEIGHT EXPRESSED AS V2O5 OF AT LEAST ONE COMPOUND CAPABLE OF YIELDING VANADIUM PENTOXIDE FROM 10% BY WEIGHT TO 55% BY WEIGHT EXPRESSED AS SIO2 OF AT LEAST ONE COMPOUND CAPABLE OF YIELDING SILICON OXIDE, A SOURCE OF ALKALI METAL IONS PRESENT IN AMOUNT SUCH THAT THERE IS 0.25% BY WEIGHT TO 8% BY WEIGHT OF ALKALI METAL IONS PRESENT IN THE CALCINATION MIXTURE, A SOURCE OF FLUORIDE IONS PRESENT IN THE AMOUNTS SUCH THAT THERE IS 0.25% BY WEIGHT TO 5% BY WEIGHT OF FLUORIDE IONS PRESENT IN THE CALCINATION MIXTURE, OF A SOURCE OF HALIDE, IONS SELECTED FROM THE GROUP CONSISTING OF CHLORIDE AND BROMIDE IONS PRESENT IN AMOUNTS SUCH THAT THERE IS 0.25% BY WEIGHT TO 8% BY WEIGHT OF HALIDE IONS OTHER THAN FLUORIDE IONS PRESENT IN THE CALCINATION MIXTURE AT A CALCINATION TEMPERATURE OF FROM 650* C. TO 1000* 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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |