US3383231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating pigmentary tio2
Assignee: American Potash and Chemical Corp
•
Filing: 1964-03-20
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Granted: 1968-05-14
•
Expires: 1984-03-20
Abstract
No abstract record available.
Inventors
- 👤 Benjamin W Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:26
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/06; C09C3/063; C09C3/08; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2284772A
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US2387534A
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US2671031A
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US3035966A
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US3203818A
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US3146119A
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US3251705A
Cited
US3220867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |