Patent US3203818A successfully refreshed from Google Patents.
US3203818A
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Photochemically stable rutile pigments and method for producing same
Assignee: Titan GmbH
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Filing: 1961-10-31
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Granted: 1965-08-31
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Expires: 1981-10-31
Abstract
No abstract record available.
Inventors
- 👤 Rechmann Heinz
- 👤 Friedrich W Vial
- 👤 Weber Heinz Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:41
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2004/88; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2998
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A PHOTOCHEMICALLY STABLE CALCINED RUTILE TIO2 PIGMENT HAVING A CALCINED COATING ON SAID PIGMENT CONSISTING OF SILICON OXIDE AND ALUMINUM OXIDE IN AN AMOUNT AS SIO2 AND AL2O3 RESPECTIVELY, IN THE RANGE OF FROM 0.5 TO 5.0% RESPECTIVELY ON A TIO2 WEIGHT BASIS AND CHARACTERIZED BY A SUPERIMPOSED DRIED HYDROUS METAL OXOIDE COATING CONSISTING OF AT LEAST ONE HYDROUS METAL OXIDES SELECTED FROM THE GROUP CONSISTING OF THE HYDROUS OXIDES OF SILICON, ALUMINUM, AND CERIUM THE AMOUNT OF HYDROUS METAL OXIDES OF SILICON AND ALUMINUM BEING IN THE RANGE FROM 0.5% TO 5.0% BY WEIGHT OF TIO2 AND THE AMOUNT OF HYDROUS CERIUM OXOIDE BEING IN THE RANGE FROM 0.1% TO 1.0%.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |