Patent US2780558A successfully refreshed from Google Patents.
US2780558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of improved pigments
Assignee: EIDP Inc
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Filing: 1953-07-22
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Granted: 1957-02-05
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Expires: 1973-07-22
Abstract
No abstract record available.
Inventors
- 👤 Oswin B Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:58
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3669; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/60; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
A PROCESS FOR PREPARING AN ALUMINA-COATED TITANIUM OXIDE PIGMENT WHICH COMPRISES HYDROLYZING ALUMINA ONTO THE SURFACES OF SAID PIGMENT BY MIXING IT WITH FROM ABOUT 1-10% BY WEIGHT OF AN ALUMINUM ALKOXIDE SELECTED FROM THE GROUP CONSISTING OF AN ALCOHOLATE AND PHENYLATE, SUBJECTING THE RESULTING MIXTURE TO DRY GRINDING IN THE PRESENCE OF SUPERHEATED STEAM, AND RECOVERING THE RESULTING PRODUCT.
References Cited (Backward Citations)
US2357101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |