Patent US3528769A successfully refreshed from Google Patents.
US3528769A
Expired / Lapsed
US
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Method of treating secondary kaolin
Assignee: Georgia Kaolin Co
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Filing: 1966-11-15
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Granted: 1970-09-15
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Expires: 1986-11-15
Abstract
No abstract record available.
Inventors
- 👤 Sanford C Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:06
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; C04B33/30; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01; C01P; C01P2002/00; C01P2002/80; C01P2002/84; C01P2004/00; C01P2004/20; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/21; C01P2006/22; C01P2006/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2305404A
Cited
US2904267A
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US2920832A
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US3058671A
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US3171718A
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US3343973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |