US2584286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation and drying of catalytic hydrogel beads
Assignee: Standard Oil Development Co
•
Filing: 1944-03-11
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Granted: 1952-02-05
•
Expires: 1964-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jerry A Pierce
- 👤 Jr Charles N Kimberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:15
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A CONTINUOUS PROCESS FOR PREPARING DRY ADSORBENT ALUMINA GEL IN SPHERICAL FORM COMPRISING EMULSIFYING ALUMINA SOL IN MINERAL OIL, MAINTAINING SAID EMULSION AT A TEMPERATURE BETWEEN 150 AND 200* F. FOR A PERIOD OF TIME SUFFICIENT TO CAUSE SAID SOL TO SET TO A HYDROGEL, MAINTAINING SAID HYDROGEL DISPERSED IN SAID OIL FOR A FURTHER PERIOD OF TIME AT THE SAME TEMPERATURE TO DISTILL THE WATER THEREFROM AND FORM DRY HARD SPHERICAL PARTICLES OF ALUMINA GEL, PASSING AN INERT GAS THROUGH THE OIL CONTAINING THE DISPERSED HYDROGEL PARTICLES TO ASSIST IN REMOVING WATER FROM THE HYDROGEL PARTICLES, SEPARATING SAID ALUMINA GEL PARTICLES FROM SAID OIL AND RETURNING SAID OIL TO SAID EMULSIFYING STEP.
Claim 2
Dependent Claim
113 words
A CONTINUOUS PROCESS FOR PREPARING DRY ADSORBENT ALUMINA GEL IN SPHERICAL FORM COMPRISING EMULSIFYING ALUMINA SOL IN MINERAL OIL, MAINTAINING SAID EMULSION AT A TEMPERATURE BETWEEN 150 AND 200* F. FOR A PERIOD OF TIME SUFFICIENT TO CAUSE SAID SOL TO SET TO A HYDROGEL, MAINTAINING SAID HYDROGEL DISPERSED IN SAID OIL FOR A FURTHER PERIOD OF TIME AT THE SAME TEMPERATURE TO DISTILL THE WATER THEREFROM AND FORM DRY HARD SPHERICAL PARTICLES OF ALUMINA GEL, PASSING AN INERT GAS THROUGH THE OIL CONTAINING THE DISPERSED HYDROGEL PARTICLES TO ASSIST IN REMOVING WATER FROM THE HYDROGEL PARTICLES, SEPARATING SAID ALUMINA GEL PARTICLES FROM SAID OIL AND RETURNING SAID OIL TO SAID EMULSIFYING STEP.
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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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |