Patent US3735000A successfully refreshed from Google Patents.
US3735000A
Expired / Lapsed
US
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Process for preparing titanium dioxide
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1970-07-14
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Granted: 1973-05-22
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Expires: 1990-07-14
Abstract
Abstract TITANIUM TETRACHLORIDE IS OXIDISED TO TITANIUM DIOXIDE IN A BURNER-HEATED CHAMBER OF PARTICULAR DESIGN PREVENTING FORMATION OF DEPOSITS ON THE WALLS AND IN THE FEED PASSAGES FOR TITANIUM TETRACHLORIDE.
Inventors
- 👤 B Calcagno
- 👤 L Piccolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:08
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07; C01P; C01P2004/00; C01P2004/51; C01P2004/52; C01P2004/60; C01P2004/62; C01P2006/00; C01P2006/60
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |