US3681133A
Expired / Lapsed
US
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Photoconductive titanium dioxide composition
Assignee: NL Chemicals Inc
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Filing: 1970-12-07
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Granted: 1972-08-01
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Expires: 1990-12-07
Abstract
Abstract A NEW TYPE OF PHOTOCONDUCTIVE ANATASE TITANIUM DIOXIDE COMPOSITION HAS BEEN PRODUCED WHICH COMPRISES EUHEDRAL SHAPED TITANIUM DIOXIDE PARTICLES HAVING AN AVERAGE INDIVIDUAL, CRYSTAL SIZE FROM 0.2 TO 5.0 MICRONS, THE SURFACE OF SAID CYRSTALS CONTAINING A DESNE COATING OF LEAD OXIDE IN AMOUNT FROM 0.2% TO 4%, THE PERCENTAGES CALCULATED AS PBO AND BASED ON THE WEIGHT OF THE TITANIUM DIOXIDE.
Inventors
- 👤 Horace F Dantro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:33
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/063; H; H10; H10P; H10P95/00; B01J35/00; B01J35/30; B01J35/39; C; C08; C08K; C08K9/00; C08K9/02; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/12
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |