Patent US2412862A successfully refreshed from Google Patents.
Patent US3518053A successfully refreshed from Google Patents.
US3518053A
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Method for producing an improved titanium dioxide pigment
Assignee: NL Chemicals Inc
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Filing: 1968-04-16
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Granted: 1970-06-30
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Expires: 1988-04-16
Abstract
No abstract record available.
Inventors
- 👤 George A Kolznak
- 👤 Lancelot W Row
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:11
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/0475; C01G23/053; C01G23/0532; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/043; C09C3/06; C09C3/063; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/10; C01P2006/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1361867A
Cited
US2055221A
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US2069554A
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US2766133A
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US2817595A
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US3071439A
Cited
US3091515A
Cited
US3337300A
Cited
US3403977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |