US4097300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic pigments and process for preparing same
Assignee: Montedison SpA
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Filing: 1977-07-18
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Granted: 1978-06-27
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Expires: 1997-07-18
Abstract
Abstract The present invention relates to new inorganic pigments and to a process for preparing same. More particularly, it relates to new yellowish-green pigments consisting of titanium compounds. These pigments consist of the crystalline phases rutile TiO2, perovskite CaCO3 and trigonal CoTiO3. They contain 2 to 12% by weight of cobalt and 4 to 20% by weight of calcium based on total TiO2 and they have a dominant wave length lambda D comprised between 530 and 560 m mu .
Inventors
- 👤 Luigi Balducci
- 👤 Dino Sarti
- 👤 Fausto Gerelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:36
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C01; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A coloured pigment based on titanium compounds characterized in that it consists of the crystalline phases rutile TiO 2 , perovskite CaTiO 3 and trigonal CoTiO 3 ; it contains 2 to 12% by weight of cobalt and 4 to 20% by weight of calcium, based on the weight of the total TiO 2 , and it has a dominant wave length λ D comprised between 530 and 560 mμ.
Claim 2
Dependent Claim
70 words
A coloured pigment based on titanium compounds characterized in that it consists of the crystalline phases rutile TiO 2 , perovskite CaTiO 3 and trigonal CoTiO 3 ; it contains 2 to 12% by weight of cobalt and 4 to 20% by weight of calcium, based on the weight of the total TiO 2 , and it has a dominant wave length λ D comprised between 530 and 560 mμ.
Claim 3
Dependent Claim
32 words
A coloured pigment according to claim 1, characterized in that it contains also aluminium in such amount that the Al 2 O 3 /Co molar ratio is comprised between 0.01 and 0.20.
Claim 4
Dependent Claim
30 words
A coloured pigment according to claim 1, characterized in that the cobalt amount ranges from 5 to 12% by weight, based on the weight of the total TiO 2 .
Claim 5
Dependent Claim
30 words
A coloured pigment according to claim 1, characterized in that the calcium amount ranges from 8 to 20% by weight, based on the weight of the total TiO 2 .
Claim 6
Dependent Claim
23 words
A coloured pigment according to claim 2, characterized in that the Al 2 O 3 /Co molar ratio ranges from 0.10 to 0.20.
Claim 7
Dependent Claim
65 words
A coloured pigment according to claim 2, characterized in that the cobalt amount is comprised between 5 and 12% by weight, based on the weight of the total TiO 2 , and the calcium amount between 8 and 20% by weight, based on the weight of the total TiO 2 , the Al 2 O 3 /Co molar ratio being comprised between 0.10 and 0.20.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |