Patent US3320076A successfully refreshed from Google Patents.
US3320076A
Expired / Lapsed
US
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Method of reclaiming calcined kaolin from de-inking sludge residue
Assignee: Hydrand Corp
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Filing: 1965-05-19
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Granted: 1967-05-16
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Robert W Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:47
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/42; C01B33/26; C01B33/40; C01B33/46; C04; C04B; C04B33/00; C04B33/02; C04B33/04; Y; Y10; Y10S; Y10S162/00; Y10S162/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |