Patent US2380886A successfully refreshed from Google Patents.
Patent US2703315A successfully refreshed from Google Patents.
US2703315A
Expired / Lapsed
US
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Manufacture of shaped alumina particles
Assignee: Universal Oil Products Co
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Filing: 1950-12-16
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Granted: 1955-03-01
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Expires: 1970-12-16
Abstract
No abstract record available.
Inventors
- 👤 Maurice J Murray
- 👤 Reno W Moehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:46
CPC Classifications
B; B01; B01J; B01J21/00; C; C01; C01F; C01F7/00; C01F7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE MANUFACTURE OF SHAPED ALUMINA PARTICLES, WHICH COMPRISES UTIMATELY DISPERSING GASESOUS AMMONIA THROUGHOUT AN ALUMINA SOL AND CONTINUING THE INTRODUCTION OF THE GASEOUS AMMONIA TO THE SOL UNTIL THE RESULTANT MIXTURE ATTAINS A PH OF ABOUT 5, THEREAFTER ADDING AN ORGANIC BASIS GELLING AGENT AND MAINTAINING THE MIXTURE AT BELOW GELATION TEMPERATURE, PASSING THE MIXTURE IN THE FORM OF DROPLETS INTO A WATER-IMMISCIBLE SUSPENDING MEDIUM MAINTAINED AT A TEMPERATURE OF FROM ABOUT 120* TO ABOUT 220* F. AND RETAINING THE DROPLETS IN SAID MEDIUM FOR A SUFFICIENT TIME TO FORM HYDROGEL PARTICLES THEREFROM.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE MANUFACTURE OF SHAPED ALUMINA PARTICLES, WHICH COMPRISES UTIMATELY DISPERSING GASESOUS AMMONIA THROUGHOUT AN ALUMINA SOL AND CONTINUING THE INTRODUCTION OF THE GASEOUS AMMONIA TO THE SOL UNTIL THE RESULTANT MIXTURE ATTAINS A PH OF ABOUT 5, THEREAFTER ADDING AN ORGANIC BASIS GELLING AGENT AND MAINTAINING THE MIXTURE AT BELOW GELATION TEMPERATURE, PASSING THE MIXTURE IN THE FORM OF DROPLETS INTO A WATER-IMMISCIBLE SUSPENDING MEDIUM MAINTAINED AT A TEMPERATURE OF FROM ABOUT 120* TO ABOUT 220* F. AND RETAINING THE DROPLETS IN SAID MEDIUM FOR A SUFFICIENT TIME TO FORM HYDROGEL PARTICLES THEREFROM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |