Patent US3208866A successfully refreshed from Google Patents.
US3208866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tio2 manufacture
Assignee: EIDP Inc
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Filing: 1963-07-15
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Granted: 1965-09-28
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Ernest D Lewis
- 👤 Juergen H Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:21
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR PRODUCING PIGMENTARY TIO2 HAVING IMPROVED PROPERTIES IN RESPECT TO IN-PROCESS BULK DENSITY AND CARBON BLACK UNDERTONE, WHICH COMPRISES REACTING IN THE VAPOR PHASE WITHIN A CLOSED REACTION ZONE A TEMPERATURES RANGING FROM 900-1400*C. AND IN THE PRESENCE OF FROM .1-3%, BASED ON SAID TIO2, OF WATER VAPOR NUCLEANT, TIC14 CONTAINING ABOUT 1%, BASED ONTHE TIO2, OF ALUMINUM CHLORIDE, WITH AN OXYGEN-CONTAINING GAS TO WHICH GAS HAS BEEN ADDED FROM 1 TO 5,000 PARTS PER MILLION, ALSO BASED ON SAID TIO2, OF A POTASSIUM NUCLEANT, AND THEREAFTER WET FINISHING AND RECOVERING THE RESULTING TIO2 PRODUCT.
Claim 2
Dependent Claim
97 words
A PROCESS FOR PRODUCING PIGMENTARY TIO2 HAVING IMPROVED PROPERTIES IN RESPECT TO IN-PROCESS BULK DENSITY AND CARBON BLACK UNDERTONE, WHICH COMPRISES REACTING IN THE VAPOR PHASE WITHIN A CLOSED REACTION ZONE A TEMPERATURES RANGING FROM 900-1400*C. AND IN THE PRESENCE OF FROM .1-3%, BASED ON SAID TIO2, OF WATER VAPOR NUCLEANT, TIC14 CONTAINING ABOUT 1%, BASED ONTHE TIO2, OF ALUMINUM CHLORIDE, WITH AN OXYGEN-CONTAINING GAS TO WHICH GAS HAS BEEN ADDED FROM 1 TO 5,000 PARTS PER MILLION, ALSO BASED ON SAID TIO2, OF A POTASSIUM NUCLEANT, AND THEREAFTER WET FINISHING AND RECOVERING THE RESULTING TIO2 PRODUCT.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |