Patent US2912420A successfully refreshed from Google Patents.
US2912420A
Expired / Lapsed
US
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Process for polymerizing olefins
Assignee: Sunoco Inc
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Filing: 1957-04-17
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Granted: 1959-11-10
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Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Charles L Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:03
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
PROCESS FOR THE PREPARATION OF A SOLID POLYPROPYLENE PRODUCT WHICH COMPRISES CONTACTING SOLID POLYPROPYLENE HAVING INORGANIC TITANIUM COMPONENTS WITH AN AQUEOUS SOLUTION OF OXILIC ACID, AND SEPARATING THE POLYMER FROM THE AQUEOUS OXILIC ACID SOLUTION.
Claim 2
Dependent Claim
35 words
PROCESS FOR THE PREPARATION OF A SOLID POLYPROPYLENE PRODUCT WHICH COMPRISES CONTACTING SOLID POLYPROPYLENE HAVING INORGANIC TITANIUM COMPONENTS WITH AN AQUEOUS SOLUTION OF OXILIC ACID, AND SEPARATING THE POLYMER FROM THE AQUEOUS OXILIC ACID SOLUTION.
References Cited (Backward Citations)
US2699457A
Cited
BE533362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |