US3309214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcined pigments from kaolin
Assignee: Bayer AG
•
Filing: 1964-05-25
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Granted: 1967-03-14
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Podschus Ernst
- 👤 Joseph Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:19
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; C04B33/30; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C09; C09C; C09C1/00; C09C1/28; C09C1/40; C09C1/42; C01; C01P; C01P2002/00; C01P2002/80; C01P2002/84; C01P2004/00; C01P2004/51; C01P2006/00; C01P2006/10; C01P2006/19; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PRODUCTION OF CALCINED PIGMENTS FROM KAOLIN WHICH CONSISTS OF DEHYDRATING KAOLIN CLAY BY SHOCK CALCINATION AT A TEMPERATURE BETWEEN 600 TO 1000*C. FOR A PERIOD OF TIME NOT IN EXCESS OF ABOUT 1 SECOND IN A HOT GAS STREAM AND THEREAFTER PARTIALLY CRYSTALLIZING THE SHOCK CALCINED PRODUCT INTO GAMMAA12O3 AND MULLITE BY CALCINING SAID PRODUCT IN A STREAM OF HOT COMBUSTION GASES AT A TEMPERATURE OF BETWEEN 800 TO 1100*C. FOR A PERIOD OF TIME OF AT LEAST TEN MINUTES.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE PRODUCTION OF CALCINED PIGMENTS FROM KAOLIN WHICH CONSISTS OF DEHYDRATING KAOLIN CLAY BY SHOCK CALCINATION AT A TEMPERATURE BETWEEN 600 TO 1000*C. FOR A PERIOD OF TIME NOT IN EXCESS OF ABOUT 1 SECOND IN A HOT GAS STREAM AND THEREAFTER PARTIALLY CRYSTALLIZING THE SHOCK CALCINED PRODUCT INTO GAMMAA12O3 AND MULLITE BY CALCINING SAID PRODUCT IN A STREAM OF HOT COMBUSTION GASES AT A TEMPERATURE OF BETWEEN 800 TO 1100*C. FOR A PERIOD OF TIME OF AT LEAST TEN MINUTES.
References Cited (Backward Citations)
GB894383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |