US3721632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of catalyst preparation
Assignee: Cities Service Co
•
Filing: 1970-12-30
•
Granted: 1973-03-20
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Expires: 1990-12-30
Abstract
Abstract A PROCESS FOR THE PREPARATION OF SUPPORTED CATALYSTS. THE COMPONENTS OF THE CATALYST ARE MELTED AND MIXED WITH A SUITABLE POROUS SUPPORT MATERIAL OR CARRIER. ON COOLING, THE SUPPORT MATERIAL IS COATED AND/OR IMPREGNATED WITH THE SOLIDIFIED CATALYST.
Inventors
- 👤 C Miller
- 👤 F Welch
- 👤 Alister B Mc
- 👤 B Welch
- 👤 Alister C Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:00
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01; C01B7/03; C01B7/04; B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/10; B01J37/00; B01J37/02; B01J37/0215; B01J37/023; C07; C07C; C07C17/00; C07C17/093; C07C17/15; C07C17/152; C07C17/154
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |