US3107150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the whiteness of tio-pigment material minutely contaminated with carbonaceous matter
Assignee: EIDP Inc
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Filing: 1959-01-30
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Granted: 1963-10-15
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Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
- 👤 Albert H Angerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:27
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/0475; 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: 2
Claim 1
Independent Claim
41 words
A METHOD FOR IMPROVING THE WHITENESS OF AN INORGANIC TITANIUM DIOXIDE-CONTAINING PIGMENT MATERIAL CONTAMINATED WITH MINUTE, DISCOLORING AMOUNTS OF CARBONACEOUS MATER WHICH COMPRISES CONTACTING SAID MATERIAL AT TEMPERATURES BETWEEN ABOUT 850*C. AND THE USUAL MAXIMUM CALCINATION TEMPERATURE FOR SAID PIGMENT MATERIAL
Claim 2
Independent Claim
41 words
A METHOD FOR IMPROVING THE WHITENESS OF AN INORGANIC TITANIUM DIOXIDE-CONTAINING PIGMENT MATERIAL CONTAMINATED WITH MINUTE, DISCOLORING AMOUNTS OF CARBONACEOUS MATER WHICH COMPRISES CONTACTING SAID MATERIAL AT TEMPERATURES BETWEEN ABOUT 850*C. AND THE USUAL MAXIMUM CALCINATION TEMPERATURE FOR SAID PIGMENT MATERIAL
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) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |