US3345133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of beryllium oxide of fine particle size thru crystallization and calcination
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1965-03-11
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Granted: 1967-10-03
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Expires: 1985-03-11
Abstract
No abstract record available.
Inventors
- 👤 Steele Bernard Robert
- 👤 Rigby Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:57
CPC Classifications
C; C01; C01F; C01F3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5124; Y10T29/5127; Y10T29/5128
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR THE PRODUCTION OF BERYLLIUM OXIDE OF FINE PARTICLE SIZE COMPRISING THE STEPS OF PASSING A HOT SATURATED SOLUTION OF BERYLLIUM SULPHATE INTO A CHILLED AND CONTINUOUSLY COOLED AQUEOUS SOLUTION OF AT LEAST ONE ORGANIC ALCOHOL, THE ORGANIC ALCOHOL BEING NON-REACTIVE WITH BERYLLIUM SULPHATE AND LIMITING THE SOLUBILITY OF BERYLLIUM SULPHATE IN SAID SOLUTION TO A LOW AMOUNT WHEREBY BERYLLIUM SULPHATE TETRAHYDRATE CYRSTALS IN FINE CRYSTALLINE FORM ARE PRODUCED BY PRECIPITATION FROM THE SOLUTION, SEPARATING SAID BERYLLIUM SULPHATE TETRAHYDRATE CRYSTALS FROM SAID SOLUTION, HEATING SAID SEPARATED CRYSTALS TO DRIVE OFF WATER CRYSTALLIZATION TO FORM BERYLLIUM SULPHATE DIHYDRATE CRYSTALS, AND CALCINING SAID BERYLLIUM SULPHATE DIHYDRATE CRYSTALS BY HEATING IN AIR TO PRODUCE BERYLLIUM OXIDE OF FINE PARTICLE SIZE, SAID ORGANIC ALCOHOL FURTHER BEING CAPABLE OF REMOVAL FROM THE BERYLLIUM HYDRATE CRYSTALS DURING THE HEATING THEREOF.
Claim 2
Dependent Claim
136 words
A PROCESS FOR THE PRODUCTION OF BERYLLIUM OXIDE OF FINE PARTICLE SIZE COMPRISING THE STEPS OF PASSING A HOT SATURATED SOLUTION OF BERYLLIUM SULPHATE INTO A CHILLED AND CONTINUOUSLY COOLED AQUEOUS SOLUTION OF AT LEAST ONE ORGANIC ALCOHOL, THE ORGANIC ALCOHOL BEING NON-REACTIVE WITH BERYLLIUM SULPHATE AND LIMITING THE SOLUBILITY OF BERYLLIUM SULPHATE IN SAID SOLUTION TO A LOW AMOUNT WHEREBY BERYLLIUM SULPHATE TETRAHYDRATE CYRSTALS IN FINE CRYSTALLINE FORM ARE PRODUCED BY PRECIPITATION FROM THE SOLUTION, SEPARATING SAID BERYLLIUM SULPHATE TETRAHYDRATE CRYSTALS FROM SAID SOLUTION, HEATING SAID SEPARATED CRYSTALS TO DRIVE OFF WATER CRYSTALLIZATION TO FORM BERYLLIUM SULPHATE DIHYDRATE CRYSTALS, AND CALCINING SAID BERYLLIUM SULPHATE DIHYDRATE CRYSTALS BY HEATING IN AIR TO PRODUCE BERYLLIUM OXIDE OF FINE PARTICLE SIZE, SAID ORGANIC ALCOHOL FURTHER BEING CAPABLE OF REMOVAL FROM THE BERYLLIUM HYDRATE CRYSTALS DURING THE HEATING THEREOF.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |