Patent US2657192A successfully refreshed from Google Patents.
US2657192A
Expired / Lapsed
US
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Polymerization of acrolein
Assignee: EIDP Inc
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Filing: 1951-01-25
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Granted: 1953-10-27
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Expires: 1971-01-25
Abstract
No abstract record available.
Inventors
- 👤 Henry C Miller
- 👤 Henry S Rothrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/14; C08G2/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PREPARATION OF ACROLEIN POLYMERS SOLUBLE AND STABLE IN DIOXANE AND CONTAINING RECURRING ACROLEIN, C3H4O, UNITS IN AMOUNT AT LEAST 5% BY WEIGHT OF THE POLYMER WHICH COMPRISES POLYMERIZING A MONOMERIC COMPOSITION CONSISTING OF MONOMERS CONTAINING, AS THEIR SOLE CARBON TO CARBON UNSATURATION, A SINGLE TERMINAL CH2=C< GROUP AND THEREBY SUBJECT TO ADDITION POLYMERIZATION AND CONTAINING AT LEAST 5% BY WEIGHT OF ACROLEIN, CH2=CH-CHO, WITH THE AID OF A CATALYTIC AMOUNT OF A FREE RADICAL PRODUCING, FREE RADICAL ADDITION POLYMERIZATION INITIATING MATERIAL IN THE PRESENCE OF AT LEAST ONE MOLE, PER MOLE OF ACROLEIN, OF A NEUTRAL PRIMARY ALCOHOL OF NOT MORE THAN TEN CARBONS.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE PREPARATION OF ACROLEIN POLYMERS SOLUBLE AND STABLE IN DIOXANE AND CONTAINING RECURRING ACROLEIN, C3H4O, UNITS IN AMOUNT AT LEAST 5% BY WEIGHT OF THE POLYMER WHICH COMPRISES POLYMERIZING A MONOMERIC COMPOSITION CONSISTING OF MONOMERS CONTAINING, AS THEIR SOLE CARBON TO CARBON UNSATURATION, A SINGLE TERMINAL CH2=C< GROUP AND THEREBY SUBJECT TO ADDITION POLYMERIZATION AND CONTAINING AT LEAST 5% BY WEIGHT OF ACROLEIN, CH2=CH-CHO, WITH THE AID OF A CATALYTIC AMOUNT OF A FREE RADICAL PRODUCING, FREE RADICAL ADDITION POLYMERIZATION INITIATING MATERIAL IN THE PRESENCE OF AT LEAST ONE MOLE, PER MOLE OF ACROLEIN, OF A NEUTRAL PRIMARY ALCOHOL OF NOT MORE THAN TEN CARBONS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |