US3471011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the brightness of clays
Assignee: JM Huber Corp
•
Filing: 1966-09-01
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Granted: 1969-10-07
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Expires: 1986-09-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph Iannicelli
- 👤 Nathan Millman
- 👤 William J D Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:41
CPC Classifications
B; B03; B03C; B03C1/00; C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; C04B33/30; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US90565A
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US403250A
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US2072907A
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US2088364A
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US2074085A
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US2230344A
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US3289836A
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US3224582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |