US3403977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of titanium dioxide granules
Assignee: NL Industries Inc
•
Filing: 1964-06-25
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Granted: 1968-10-01
•
Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Heywood
- 👤 Jr Charles R Trampier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:55
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/02; B25B13/08; B82; B82Y; B82Y30/00; C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/053; C01G23/0532; C01G23/08; C03; C03C; C03C1/00; C03C1/02; C03C1/026; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/10; C01P2006/20
Claims Analysis
Total Claims: 0
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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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |