US3169074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rutile titanium dioxide pigments and process for their production
Assignee: Fabriques de Produits Chimiques de Thann et de Mulhouse
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Filing: 1961-08-29
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Granted: 1965-02-09
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Expires: 1981-08-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Holbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:33
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/053; C01G23/0532; C01G23/0534; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/043; C09C3/06; C01P; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
RUTILE TIO2 PIGMENTS CONSISTING ESSENTIALLY OF TIO2 PARTICLES OF RUTILE CRYSTAL STRUCTURE HAVING THE REFRACTIVE INDEX, HIDING POWER AND COLOR STABILITY CHARACTERISTIC OF RUTILE PIGMENTS TOGETHER WITH THE WHITENESS AND PARTICLE FINENESS CHARACTERISTIC OF ANATASE PIGMENTS, SAID PARTICLES BEING A CALCINATE OF A RUTILE-INDUCED TIO2 HYDROLYZATE AND CONTAINING AS PRODUCED ABOUT 0.6 TO 1% OF AL2O3, 0.1 TO 0.25% OF P2O5 AND 0.25 TO 0.7% TO K2O, ALL PERCENTAGES BASED UPON THE WEIGHT OF TIO2 IN THE HYDROLYZATE.
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) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |