US3203910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of alkylenimines
Assignee: Dow Chemical Co
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Filing: 1962-04-13
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Granted: 1965-08-31
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Expires: 1982-04-13
Abstract
No abstract record available.
Inventors
- 👤 Billy W Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:01
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/56; C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD FROM PREPARING POLYAKYLENIMINES WHICH COMPRISES HEATING TOGETHER AT A TEMPERATURE FROM ABOUT 50*C. TO THE BOILING POINT OF THE SOLUTION AN AQUEOUS 5 TO 75 WEIGHT PERCENT SOLUTION OF AN ALKYLENIMINE AND A POLYHALO POLYMERIZATION INITIATOR SELECTED FROM THE GROUP CONSISTING OF POLYHALOALKANES AND POLYHALOALKYLETHERS HAVING FROM 2 TO 6 HALOGEN ATOMS PER MOLECULE WHEREIN EACH ALKANE AND ALKYL GROUP HAS FROM 1 TO 4 CARBON ATOMS, EACH HALOGEN SUBSTITUENT THEREON BEING INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, IN A RATIO OF FROM ABOUT 0.02 TO 0.002 MOLE OF INITIATOR PER MOLE OF ALKYLENIMINE FOR A TIME SUFFICIENT TO YIELD A RESINOUS POLYALKYLENIMINE.
Claim 2
Independent Claim
109 words
A METHOD FROM PREPARING POLYAKYLENIMINES WHICH COMPRISES HEATING TOGETHER AT A TEMPERATURE FROM ABOUT 50*C. TO THE BOILING POINT OF THE SOLUTION AN AQUEOUS 5 TO 75 WEIGHT PERCENT SOLUTION OF AN ALKYLENIMINE AND A POLYHALO POLYMERIZATION INITIATOR SELECTED FROM THE GROUP CONSISTING OF POLYHALOALKANES AND POLYHALOALKYLETHERS HAVING FROM 2 TO 6 HALOGEN ATOMS PER MOLECULE WHEREIN EACH ALKANE AND ALKYL GROUP HAS FROM 1 TO 4 CARBON ATOMS, EACH HALOGEN SUBSTITUENT THEREON BEING INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE, IN A RATIO OF FROM ABOUT 0.02 TO 0.002 MOLE OF INITIATOR PER MOLE OF ALKYLENIMINE FOR A TIME SUFFICIENT TO YIELD A RESINOUS POLYALKYLENIMINE.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |