Patent US3228922A successfully refreshed from Google Patents.
US3228922A
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Polymerization process using a catalyst system comprising an organo-aluminum compound, an alcohol and oxygen
Assignee: WR Grace and Co
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Filing: 1962-08-13
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Granted: 1966-01-11
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Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Aristotle G Prapas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:49
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F2/00; C08F2/04; C08F2/06; C08F20/00; C08F20/02; C08F20/10; C08F20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE PROCESS OF POLYMERIZING ESTERS OF UNSUBSTITUTED ACRYLIC ACID WHEREIN THE ALCOHOL MOIETY CONTAINS 1-13 CARBON ATOMS WHICH COMPRISES SUBJECTING SAID ESTERS TO THE ACTION OF A CATALYST CONSISTING ESSENTIALLY OF AN ALUMINUM ALKYL COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
38 words
THE PROCESS OF POLYMERIZING ESTERS OF UNSUBSTITUTED ACRYLIC ACID WHEREIN THE ALCOHOL MOIETY CONTAINS 1-13 CARBON ATOMS WHICH COMPRISES SUBJECTING SAID ESTERS TO THE ACTION OF A CATALYST CONSISTING ESSENTIALLY OF AN ALUMINUM ALKYL COMPOUND HAVING THE FORMULA:
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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |