US2992123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yellow ceramic pigments
Assignee: Harshaw Chemical Co
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Filing: 1959-04-20
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Granted: 1961-07-11
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Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Seabright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0009; C09C1/0012; C01; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
PROCESS OF MAKING A CLEAN YELLOW PIGMENT COMPRISING CALCINING IN A NONREDUCING ATMOSPHERE AT TEMPERATURES IN THE RANGE FROM 1100*C. TO 1500*C. A BATCH CONSISTING ESSENTIALLY OF MATERIALS CAPABLE OF YIELDING FROM 99.9 TO 30 PARTS BY WEIGHT OF OXIDES OFZIRCONIUM AND FROM 0.1 TO 10.0 PARTS BY WEIGHT OF OXIDES OF PRASEODYMIUM.
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) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |