US3145183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst carrying balls
Assignee: Saint Gobain Abrasives Inc
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Filing: 1958-12-16
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Granted: 1964-08-18
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Expires: 1978-12-16
Abstract
No abstract record available.
Inventors
- 👤 Henry C Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:17
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16; B01J23/00; B01J23/38; B01J23/40; B01J35/00; B01J35/50; B01J35/51; B01J35/53; B01J37/00; B01J37/02; B01J37/024; B01J37/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A ROUGHLY SPHERICAL BALL ADAPTED FOR CATALYTIC CARRIER PURPOSES COMPRISING AN ADEQUATELY STRON, HEAT-RESISTNAT, THERMAL SHOCK-RESISTANT, STABLE IMPERMEABLE CENTER ZONE OF SUBSTANTIALLY EQUIDIMENSIONAL SHAPE COMPOSED OF A CERAMIC MATERIAL HAVING A MAJOR CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, MAGNESIA, ZIRXONIA, SILICA, CHROMIA, TITANIA AND SILICON CARBIDE, SAID CENTER ZONE BEING TOTALLY ENCLOSED BY A SHELL, FIRED TO BE INTEGRAL WITH AND BONDED TO SAID CENTER ZONE, SAID SHELL BEING OF ROUGHLY SPHERICAL EXTERNAL SHAPE COMRISING AN ADEQUATELY STRONG, HEAT-RESISTANT, THERMAL SHOCK-RESISTANT, STABLE COMPOSITION COMPOSED OF AMTERIAL SELECTED FROM THE GROUP
Claim 2
Dependent Claim
92 words
A ROUGHLY SPHERICAL BALL ADAPTED FOR CATALYTIC CARRIER PURPOSES COMPRISING AN ADEQUATELY STRON, HEAT-RESISTNAT, THERMAL SHOCK-RESISTANT, STABLE IMPERMEABLE CENTER ZONE OF SUBSTANTIALLY EQUIDIMENSIONAL SHAPE COMPOSED OF A CERAMIC MATERIAL HAVING A MAJOR CONSTITUENT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, MAGNESIA, ZIRXONIA, SILICA, CHROMIA, TITANIA AND SILICON CARBIDE, SAID CENTER ZONE BEING TOTALLY ENCLOSED BY A SHELL, FIRED TO BE INTEGRAL WITH AND BONDED TO SAID CENTER ZONE, SAID SHELL BEING OF ROUGHLY SPHERICAL EXTERNAL SHAPE COMRISING AN ADEQUATELY STRONG, HEAT-RESISTANT, THERMAL SHOCK-RESISTANT, STABLE COMPOSITION COMPOSED OF AMTERIAL SELECTED FROM THE GROUP
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |