Patent US4518506A successfully refreshed from Google Patents.
Patent US3714343A successfully refreshed from Google Patents.
US3714343A
Expired / Lapsed
US
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Alumina hydrate,theta-alumina and a method for the manufacture thereof
Assignee: Mitsubishi Chemical Corp
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Filing: 1968-06-24
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Granted: 1973-01-30
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Expires: 1988-06-24
Abstract
Abstract A PURE ALUMINA HYDRATE, HAVING UNIFORM PORES, IS MANUFACTURED FROM AN ALUMINUM SALT OF A MONOBASIC ACID AND IN THE PRESENCE OF AN ACID CARBONATE. CALCINATION OF THIS PURE ALUMINA HYDRATE PRODUCES A PURE O-ALUMINA HAVING UNIFORM PORES. THIS S 0LUMINA MAYE USED AS AN DSORBENT IN GAS CHROMATOGRAPHY.
Inventors
- 👤 S Sato
- 👤 Y Otaka
- 👤 Y Takigawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:07
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/01; C01P2004/03; C01P2006/00; C01P2006/10; C01P2006/12; C01P2006/14; C01P2006/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |