US3346511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst, preparation thereof, and polymerization process using said catalyst
Assignee: British Hydrocarbon Chemicals Ltd
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Filing: 1963-07-23
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Granted: 1967-10-10
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Expires: 1983-07-23
Abstract
No abstract record available.
Inventors
- 👤 Hill Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:40
CPC Classifications
C; C08; C08F; C08F10/00; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
41 words
A PROCESS OF PREPARING A POLYMERIZATION CATALYST WHICH COMPRISES IMPREGNATING A CARRIER MATERIAL WITH VAPOR OF CHROMYL CHLORIDE; AND SUBSEQUENTLY HEATING SAID IMPREGNATED CARRIER MATERIAL IN THE PRESENCE OF MOLECULAR OXYGEN AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 1000*C.
Claim 2
Dependent Claim
41 words
A PROCESS OF PREPARING A POLYMERIZATION CATALYST WHICH COMPRISES IMPREGNATING A CARRIER MATERIAL WITH VAPOR OF CHROMYL CHLORIDE; AND SUBSEQUENTLY HEATING SAID IMPREGNATED CARRIER MATERIAL IN THE PRESENCE OF MOLECULAR OXYGEN AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 1000*C.
Claim 3
Dependent Claim
21 words
PROCESS OF CLAIM 1 WHEREIN SAID CARRIER IS SELECTED FROM THE GROUP CONSISTING OF SILICA, SILICA GEL, SILICA/ ALUMINA AND ALUMINA.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |