US3172772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the gloss properties of titanium dioxide pigments
Assignee: NL Industries Inc
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Filing: 1960-12-30
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Granted: 1965-03-09
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Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 Lancelot W Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/041; C09C3/06; C09C3/063; C09C3/08; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
PROCESS FOR THE PRODUCTION OF TITANIUM DIOXIDE PIGMENT HAVING IMPROVED GLOSS CHARACTERISTICS WHICH COMPRISES ADDING TO A WET MILLED, HYDROUS METAL OXIDE COATED TITANIUM DIOXIDE PIGMENT FROM 0.1% TO 2.0% OF AN ACID SELECTED FROM THE GROUP CONSISTING OF BENZOIC ACID AND PARA-AMINOBENZOIC ACID AND FROM 0.1% TO 2.0% OF AN AMINE SELECTED FROM THE GROUP CONSISTING OF BENZYLAMINE, ETHANOLAMINE, DIETHANOLAMINE, TRIETHANOLAMINE, DIPROPYLAMINE, MONOISOPROPANOLAMINE, ETHYLENEDIAMINE AND CYCLOHEXYLAMINE, THE PERCENTAGES BEING WEIGHT PERCENTAGES BASED ON THE WEIGHT OF THE TITANIUM DIOXIDE PIGMENT, AND WITHOUT REMOVING SAID ACID AND SAID AMINE, MILLING SAID PIGMENT.
Claim 2
Dependent Claim
92 words
PROCESS FOR THE PRODUCTION OF TITANIUM DIOXIDE PIGMENT HAVING IMPROVED GLOSS CHARACTERISTICS WHICH COMPRISES ADDING TO A WET MILLED, HYDROUS METAL OXIDE COATED TITANIUM DIOXIDE PIGMENT FROM 0.1% TO 2.0% OF AN ACID SELECTED FROM THE GROUP CONSISTING OF BENZOIC ACID AND PARA-AMINOBENZOIC ACID AND FROM 0.1% TO 2.0% OF AN AMINE SELECTED FROM THE GROUP CONSISTING OF BENZYLAMINE, ETHANOLAMINE, DIETHANOLAMINE, TRIETHANOLAMINE, DIPROPYLAMINE, MONOISOPROPANOLAMINE, ETHYLENEDIAMINE AND CYCLOHEXYLAMINE, THE PERCENTAGES BEING WEIGHT PERCENTAGES BASED ON THE WEIGHT OF THE TITANIUM DIOXIDE PIGMENT, AND WITHOUT REMOVING SAID ACID AND SAID AMINE, MILLING SAID PIGMENT.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |