US3870787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment and preparation thereof
Assignee: NL Industries Inc
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Filing: 1973-11-05
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Granted: 1975-03-11
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Expires: 1993-11-05
Abstract
Abstract Novel crystalline compounds, particularly useful as pigments, having a composition corresponding to the formula CaTiZr3O9 and distinctive X-ray diffraction patterns. One such compound can be produced by calcining to a temperature of at least 1,250*C an intimate mixture of the oxides of Ti, Ca, and Zr in approximately the atomic ratio of 1:1:3. Another such compound can be produced only by calcining, at a temperature of at least 600*C and preferably from about 800*C to about 1,000*C, a chemically homogeneous conglomerate which consists essentially of Ca, Ti, Zr, and O and at least one thermally fugitive ligand per atom of metal present. The Ca, Ti and Zr are preferably in the atomic ratios of 1:1:3 and oxygen is present in the amount necessary to form the highest oxides of the three metals. Chemically homogeneous conglomerates suitable for the production of such compound are obtainable by coprecipitation or by the evaporation of solutions.
Inventors
- 👤 Warren B Blumenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:46
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/006; C09; C09C; C09C1/00; C09C1/36; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2002/74; C01P2006/00; C01P2006/10; C01P2006/32; C01P2006/33; C01P2006/34; C01P2006/60
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
31 words
A CRYSTALLINE COMPOUND HAVING A COMPOSITION WHICH CAN BE REPRESENTED BY THE FORMULA CATIZR3O9 AND CHARACTERIZED BY AN X-RAY DIFFRACTION SPECTROGRAM, THE MOST PROMINENT D SPACINGS OF WHICH ARE AS FOLLOWS:
Claim 2
Dependent Claim
31 words
A CRYSTALLINE COMPOUND HAVING A COMPOSITION WHICH CAN BE REPRESENTED BY THE FORMULA CATIZR3O9 AND CHARACTERIZED BY AN X-RAY DIFFRACTION SPECTROGRAM, THE MOST PROMINENT D SPACINGS OF WHICH ARE AS FOLLOWS:
Claim 3
Dependent Claim
31 words
A crystalline compound having a composition which can be represented by the formula CaTiZr3O9 and characterized by an X-ray diffraction spectrogram, the most prominent d spacings of which are as follows:
Claim 4
Dependent Claim
31 words
A crystalline compound having a composition which can be represented by the formula CaTiZr3O9 and characterized by an X-ray diffraction spectrogram, the most prominent d spacings of which are as follows:
Claim 5
Dependent Claim
27 words
A crystalline, colorless compound having a composition which can be represented by the formula CaTiZr3O9 and characterized, in its X-ray diffraction spectrogram, by substantial reflections as follows:
Claim 6
Dependent Claim
27 words
A crystalline, colorless compound having a composition which can be represented by the formula CaTiZr3O9 and characterized, in its X-ray diffraction spectrogram, by substantial reflections as follows:
Claim 7
Dependent Claim
11 words
A pigment consisting essentially of the compound defined in claim 1.
Claim 8
Dependent Claim
12 words
A white pigment consisting essentially of the compound defined in claim 2.
Claim 9
Dependent Claim
36 words
A process for producing a crystalline compound having a composition that can be represented by the formula CaTiZr3O9 and which, in a typical product is characterized, in its X-ray diffraction spectrogram, by substantial reflections as follows:
Claim 10
Dependent Claim
36 words
A process for producing a crystalline compound having a composition that can be represented by the formula CaTiZr3O9 and which, in a typical product is characterized, in its X-ray diffraction spectrogram, by substantial reflections as follows:
Claim 11
Dependent Claim
25 words
A process as set forth in claim 5 in which said calcining is to a temperature in the range from about 800*C to about 1,000*C.
Claim 12
Dependent Claim
27 words
A process as set forth in claim 5 in which in said conglomerate the molar ratio of Ca, Ti, and Zr in the mixture is approximately 1:1:3.
Claim 13
Dependent Claim
20 words
56 7 3.48 11 2.93 100 2.53 21 2.17 6 1.79 51 1.65 6-7 1.59 5 1.53 30 1.46 5-6
Claim 14
Dependent Claim
20 words
56 7 3.48 11 2.93 100 2.53 21 2.17 6 1.79 51 1.65 6-7 1.59 5 1.53 30 1.46 5-6
Claim 15
Dependent Claim
25 words
A process as set forth in claim 7 in which said calcining is to a temperature in the range from about 800*C to about 1,000*C.
Claim 16
Dependent Claim
19 words
A process as set forth in claim 8 in which said conglomerate is formed by drying a coprecipitated mixture.
Claim 17
Dependent Claim
27 words
A process as set forth in claim 8 in which said conglomerate is formed by evaporation of a solution containing said metals, oxygen, and thermally fugitive ligands.
Claim 18
Dependent Claim
20 words
A process as set forth in claim 9 in which said conglomerate comprises hydrous zirconia, hydrous titania, and calcium oxalate.
Claim 19
Dependent Claim
17 words
A process as set forth in claim 10 in which said solution comprises lactates of said metals.
Claim 20
Dependent Claim
17 words
A process as set forth in claim 10 in which said solution comprises glycolates of said metals.
Claim 21
Dependent Claim
40 words
A process for producing a crystalline compound having a composition that can be represented by the formula CaTiZr3O9 and which, in a typical product, is characterized by an X-ray diffraction spectrogram in which the most prominent reflections are as follows:
Claim 22
Dependent Claim
40 words
A process for producing a crystalline compound having a composition that can be represented by the formula CaTiZr3O9 and which, in a typical product, is characterized by an X-ray diffraction spectrogram in which the most prominent reflections are as follows:
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |