US3437502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium dioxide pigment coated with silica and alumina
Assignee: EIDP Inc
•
Filing: 1968-03-28
•
Granted: 1969-04-08
•
Expires: 1988-03-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:28
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C09; C09C; C09C1/00; C09C1/36; C09C1/3607; C09C1/3653; C09C1/3661; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2004/64; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/12; C01P2006/19; C01P2006/22; C01P2006/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2387534A
Cited
US2357721A
Cited
US2591988A
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US2913419A
Cited
US2885366A
Cited
US3035966A
Cited
US3086877A
Cited
US3146119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |