Patent US2672453A successfully refreshed from Google Patents.
US2672453A
Expired / Lapsed
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Manufacture of spherical particles
Assignee: Universal Oil Products Co
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Filing: 1952-11-17
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Granted: 1954-03-16
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Expires: 1972-11-17
Abstract
No abstract record available.
Inventors
- 👤 Wankat Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:50
CPC Classifications
B; B01; B01J; B01J13/00; B01J21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF FORMING SPHERICAL PARTICLES OF AN INORGANIC OXIDE WHICH COMPRISES INTRODUCING DROPLETS OF A SOL OF SAID OXIDE INTO A BODY OF HYDROCARBON OIL CONTAINING THE CONDENSATION PRODUCT OF AN ORTHO-HYDROXY AROMATIC ALDEHYDE AND AN ALKYLENE POLYAMINE IN SUFFICIENT AMOUNT TO RETARD DETERIORATION OF SAID OIL, AND RETAINING THE DROPLETS IN THE OIL BODY FOR A SUFFICIENT TIME TO CAUSE THE DROPLETS TO SET TO HYDROGEL SPHERES.
Claim 2
Independent Claim
69 words
A METHOD OF FORMING SPHERICAL PARTICLES OF AN INORGANIC OXIDE WHICH COMPRISES INTRODUCING DROPLETS OF A SOL OF SAID OXIDE INTO A BODY OF HYDROCARBON OIL CONTAINING THE CONDENSATION PRODUCT OF AN ORTHO-HYDROXY AROMATIC ALDEHYDE AND AN ALKYLENE POLYAMINE IN SUFFICIENT AMOUNT TO RETARD DETERIORATION OF SAID OIL, AND RETAINING THE DROPLETS IN THE OIL BODY FOR A SUFFICIENT TIME TO CAUSE THE DROPLETS TO SET TO HYDROGEL SPHERES.
References Cited (Backward Citations)
US2505895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |