US3053822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing vinyl esters with a catalyst system of an aluminum alkyl compound and a ketone
Assignee: WR Grace and Co
•
Filing: 1961-04-11
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Granted: 1962-09-11
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Expires: 1981-04-11
Abstract
No abstract record available.
Inventors
- 👤 Calvin J Benning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:20
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE PROCESS OF HOMOPOLYMERIZING VINYL ACETATE WHICH COMPRISES SUBJECTING VINYL JACETATE AT A TEMPERATURE IN THE RANGE FROM MINUS 40 TO PLUS 80*C. IN AN OXYGEN-FREE ATMOSPHERE TO THE ACTION OF A CATALYST CONSISTING ESSENTIALLY OF AN ALUMINUM ALKYL COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
43 words
THE PROCESS OF HOMOPOLYMERIZING VINYL ACETATE WHICH COMPRISES SUBJECTING VINYL JACETATE AT A TEMPERATURE IN THE RANGE FROM MINUS 40 TO PLUS 80*C. IN AN OXYGEN-FREE ATMOSPHERE TO THE ACTION OF A CATALYST CONSISTING ESSENTIALLY OF AN ALUMINUM ALKYL COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2881156A
Cited
GB819291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |