US2641583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing silica gel spheres in oil
Assignee: Sinclair Refining Co
•
Filing: 1948-10-15
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Granted: 1953-06-09
•
Expires: 1968-10-15
Abstract
No abstract record available.
Inventors
- 👤 John L Gring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:57
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/16; C01B33/166; B; B01; B01J; B01J21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
IN THE PRODUCTION OF DISCRETE PARTICLES OF SILICA GEL IN SUBSTANTIALLY SPHERICAL FORM, THE IMPROVEMENT WHICH CONSISTS OF SPRAYING A STABLE AQUEOUS SOLUTION OF SODIUM SILICATE ABOVE AN OIL SATURATED WITH SULFUR DIOXIDE WHEREIN THE SPRAYED DROPLETS OF SAID SOLUTION DROP INTO THE OIL, AND RECOVERING THE PARTICLES FROM THE ACIDIC OIL.
Claim 2
Dependent Claim
52 words
IN THE PRODUCTION OF DISCRETE PARTICLES OF SILICA GEL IN SUBSTANTIALLY SPHERICAL FORM, THE IMPROVEMENT WHICH CONSISTS OF SPRAYING A STABLE AQUEOUS SOLUTION OF SODIUM SILICATE ABOVE AN OIL SATURATED WITH SULFUR DIOXIDE WHEREIN THE SPRAYED DROPLETS OF SAID SOLUTION DROP INTO THE OIL, AND RECOVERING THE PARTICLES FROM THE ACIDIC OIL.
References Cited (Backward Citations)
US1843576A
Cited
US2450394A
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US2435379A
Cited
US2448460A
Cited
US2442884A
Cited
US2455445A
Cited
US2506316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |