Patent US4744055A successfully refreshed from Google Patents.
US3258451A
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Polymerization of acrolein
Assignee: Evonik Operations GmbH
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Filing: 1964-12-09
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Granted: 1966-06-28
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Expires: 1984-12-09
Abstract
No abstract record available.
Inventors
- 👤 Rink Karl-Heinz
- 👤 Bader Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:56
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/14; C08G2/18; C08G2/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A PROCESS FOR THE POLYMERIZATION OF AN ACROLEIN MONOMER SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND A LOWER ALKYL SUBSTITUTED ACROLEIN, THE STEPS OF INITIATING POLYMERIZATION OF THE ACROLEIN MONOMER UNDER NONALKALINE CONDITIONS IN A FIRST STAGE AND AFTER 10 TO 90% OF SAID ACROLEIN MONOMER HAS UNDERGONE POLYMERIZATION UNDER THE NON-ALKALINE CONDITIONS ADDING A CATALYTICALLY EFFECTIVE AMOUNT OF A BASIC POLYMERIZATION CATALYST TO THE REACTION MIXTURE TO POLYMERIZE THE REMAINING ACROLEIN MONOMER QUANTITATIVELY IN A SECOND STAGE.
Claim 2
Dependent Claim
80 words
IN A PROCESS FOR THE POLYMERIZATION OF AN ACROLEIN MONOMER SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND A LOWER ALKYL SUBSTITUTED ACROLEIN, THE STEPS OF INITIATING POLYMERIZATION OF THE ACROLEIN MONOMER UNDER NONALKALINE CONDITIONS IN A FIRST STAGE AND AFTER 10 TO 90% OF SAID ACROLEIN MONOMER HAS UNDERGONE POLYMERIZATION UNDER THE NON-ALKALINE CONDITIONS ADDING A CATALYTICALLY EFFECTIVE AMOUNT OF A BASIC POLYMERIZATION CATALYST TO THE REACTION MIXTURE TO POLYMERIZE THE REMAINING ACROLEIN MONOMER QUANTITATIVELY IN A SECOND STAGE.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |