Patent US3565941A successfully refreshed from Google Patents.
US3565941A
Expired / Lapsed
US
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Process for the selective alkylation of polyalkylene polyamines
Assignee: Dow Chemical Co
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Filing: 1968-07-31
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Granted: 1971-02-23
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Expires: 1988-07-31
Abstract
Abstract IN THE PROCESS OF ALKYLATING A POLYALKYLENE POLYAMIE, IT IS FOUND THAT BY FIRST REACTING THE POLYAMINE WITH AN ACID THE PRIMARY AMINO GROUPS ARE EFFECTIVELY BLOCKED FROM ALKYLATION AND THEREFORE SELECTIVE ALKYLATION AT THE SECONDARY AMINO GROUPS IS OBTAINED IN THE REACTION BETWEEN AN ALKYLATING AGENT AND THE POLYALKYLENE POLYAMINE SALT. THE ALKYLATED POLYAMINES ARE USEFUL AS CHEMICAL INTERMEDIATES, MONOMERS, BASES AND FLOCCULATING AGENTS.
Inventors
- 👤 Clarence R Dick
- 👤 James Larry Potter
- 👤 William P Coker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:51
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C07; C07C; C07C209/00; C07C209/04; C07C209/06; C07C209/08; C07C209/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |