Patent US3300463A successfully refreshed from Google Patents.
US3300463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalysts and process
Assignee: Shell USA Inc
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Filing: 1962-12-13
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Granted: 1967-01-24
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Expires: 1982-12-13
Abstract
No abstract record available.
Inventors
- 👤 Mare Harold E De La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:41
CPC Classifications
C; C08; C08F; C08F10/00; C08F136/00; C08F136/02; C08F136/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A CATALYTIC COMPOSITION COMPRISING A GROUP VI-B METAL COMPOUND HAVING THE GENERAL CONFIGURATION
Claim 2
Dependent Claim
46 words
A METHOD FOR POLYMERIZING AN ALIPHATIC HYDROCARBON HAVING 1-2 OLEFINIC LINKAGES AND 2-8 CARBON ATOMS PER MOLECULE OF THE GROUP CONSISTING OF ALPHA OLEFINS AND CONJUGATED DIENES WHICH COMPRISES CONTACTING THE OLEFIN WITH A CATALYTIC COMPOSITION ACCORDING TO CLAIM 2 IN AN INERT ATMOSPHERE AT 0-75*C.
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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |