US3577313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products of amines with epihalohydrins
Assignee: Amicon Corp
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Filing: 1967-10-16
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Granted: 1971-05-04
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Expires: 1987-10-16
Abstract
Abstract A CONDENSATION PRODUCT, WITH AN EPIHALOHYDRIN, OF A POLYALKYLENE POLYAMINE HAVING THE COMPSITION NH2-(A-NH)A-H IN WHICH A REPRESENTS A STRAIGHT CHAIN ALKYLENE GROUP HAVING 4 TO 8 CARBON ATOMS AND N IS A NUMBER FROM 2 TO 6 AND A SECOND AMINO COMPOUND SELECTED FROM THE CLASS CONSISTING OF AMMONIA; HYDRAZINE; AND THE POLYETHYLENE POLYAMINES, POLYPROPYLENE POLYAMINES, ALKANOLAMINES, AND ETHYLAMINE ALKANOLAMNES HAVING AT LEAST TWO HYDROGEN ATOMS ATTACHED TO AMINO NITROGEN, HAVING A MISCIBILITY WITH WATER OF AT LEAST 20% BY WEIGHT OF AMINO COMPOUND AND HAVING A PKA AT 25*C. OF AT LEAST ABOUT 9.0.
Inventors
- 👤 Justin C Bolger
- 👤 Robert William Hausslein
- 👤 Hugh Evan Mccollum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:26
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; C08G59/00; C08G59/02; C08G59/10; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |