US3092454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparing alumina beta trihydrate
Assignee: Air Products and Chemicals Inc
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Filing: 1959-11-20
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Granted: 1963-06-04
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Expires: 1979-11-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Louis C Doelp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:03
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF PREPARING AN ALUMINA HYDRATE CONSISTING PREDOMINANTLY OF ALUMINA BETA TRIHYDRATE WHICH INCLUDES THE STEPS OF: DISPERSING HYDRATED ALUMINA SELECTED FROM THE GROUP CONSISTING OF ALUMINA ALPHA MONOHYDRATE, ALUMINA ALPHA TRIHYDRATE, AMORPHOUS GELATINOUS HYDRATED ALUMINA, AND MIXTURES THEREOF AT A TEMPERATURE LOWER THAN ABOUT 40*C. IN AN AQUEOUS SOLUTION OF MORE THAN 1 BUT LESSTHAN 10 MOLAR OF A TETRAMETHYL AMMONIUM HYDROXIDE TO PROVIDE A SOLUTION CONTAINING TETRAMETHYL AMMONIUM ALUMINATE; ADDING CARBON DIOXIDE TO SAID SOLUTION OF TETRAMETHYLAMMONIUM ALUMINATE AT A TEMPERATURE LOWER THAN ABOUT 40*C. TO PRECIPATE AN ALUMINA HYDRATE CONSISTING PREDOMINANTLY OF ALUMINA BETA TRIHYDRATE; SEPARATING SAID PRECIPITATE; AND DRYING SAID PRECIPITATE TO PROVIDE AN ALUMINA HYDRATE POWDER CONSISTING PREDOMINANTLY OF ALUMINA BETA TRIHYDRATE.
Claim 2
Independent Claim
118 words
THE METHOD OF PREPARING AN ALUMINA HYDRATE CONSISTING PREDOMINANTLY OF ALUMINA BETA TRIHYDRATE WHICH INCLUDES THE STEPS OF: DISPERSING HYDRATED ALUMINA SELECTED FROM THE GROUP CONSISTING OF ALUMINA ALPHA MONOHYDRATE, ALUMINA ALPHA TRIHYDRATE, AMORPHOUS GELATINOUS HYDRATED ALUMINA, AND MIXTURES THEREOF AT A TEMPERATURE LOWER THAN ABOUT 40*C. IN AN AQUEOUS SOLUTION OF MORE THAN 1 BUT LESSTHAN 10 MOLAR OF A TETRAMETHYL AMMONIUM HYDROXIDE TO PROVIDE A SOLUTION CONTAINING TETRAMETHYL AMMONIUM ALUMINATE; ADDING CARBON DIOXIDE TO SAID SOLUTION OF TETRAMETHYLAMMONIUM ALUMINATE AT A TEMPERATURE LOWER THAN ABOUT 40*C. TO PRECIPATE AN ALUMINA HYDRATE CONSISTING PREDOMINANTLY OF ALUMINA BETA TRIHYDRATE; SEPARATING SAID PRECIPITATE; AND DRYING SAID PRECIPITATE TO PROVIDE AN ALUMINA HYDRATE POWDER CONSISTING PREDOMINANTLY OF ALUMINA BETA TRIHYDRATE.
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |