Patent US2744029A successfully refreshed from Google Patents.
US2744029A
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Preparation of water dispersible titanium dioxide pigment
Assignee: NL Industries Inc
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Filing: 1952-05-24
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Granted: 1956-05-01
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Expires: 1972-05-24
Abstract
No abstract record available.
Inventors
- 👤 Franklin L Kingsbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:06
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/041; C09C3/043; C09C3/06; C09C3/08; C01; C01P; C01P2006/00; C01P2006/22; C01P2006/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
IN A PROCESS FOR MAKING A WATER DISPERSIBLE TITANIUM DIOXIDE PIGMENT MATERIAL FROM A CALCINED TITANIUM DIOXIDE HYDRATE IN WHICH THE TITANIUM DIOXIDE PIGMENT MATERIAL IS CALCINED AND WET MILLED THE STEPS OF: FLOCCULATING THE CALCINED WET MILLED PIGMENT MATERIAL IN THE PRESENCE OF A VOLATILE ORGANIC FLOCCULATING AGENT COMPRISING A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF FORMIC ACID, AND ACETIC ACID TO PRODUCE A TITANIUM DIOXIDE FLOCCULENT; HEATING SAID FLOCCULENT TO A TEMPERATURE FROM ABOUT 110* C. TO ABOUT 180* C. TO DRY SAID FLOCCULENT AND SIMULTANEOUSLY VOLATILIZE AND REMOVE ANY TRACE OF SAID ORGANIC FLOCCULATING AGENT THEREFROM; AND THEN MILLING SAID DRIED FLOCCULENT TO PRODUCE A WATER DISPERSIBLE TITANIUM DIOXIDE PIGMENT MATERIAL.
References Cited (Backward Citations)
US2297523A
Cited
US2365560A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |