US3499730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing titanium dioxide by the vapor phase oxidation of titanium tetrachloride
Assignee: Thann and Mulhouse SA
•
Filing: 1966-07-29
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Granted: 1970-03-10
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Expires: 1986-07-29
Abstract
No abstract record available.
Inventors
- 👤 Pierre J Portes
- 👤 Robert Jean Mas
- 👤 Jacques Hugues Richerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:42
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; C01B13/20; C01B13/22; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2155119A
Cited
US2670275A
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US2670272A
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US2750260A
Cited
US2915367A
Cited
US2957753A
Cited
US3203763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |