US3210299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene imine anion-exchange resins of sponge-like structure
Assignee: Bayer AG
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Filing: 1962-09-11
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Granted: 1965-10-05
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Expires: 1982-09-11
Abstract
No abstract record available.
Inventors
- 👤 Hagge Walter
- 👤 Naumann Gunther
- 👤 Schneider Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:02
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/10; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PROCESS FOR MANUFACTURING ANION-EXCHANGE RESINS BY CONDENSATION OF A POLYETHYLENE IMINE WITH AN EPIHALOHYDRIN IN AN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONDENSATION IN THE PRESENCE OF AN ORGANIC SOLVENT WHICH IS IMMISCIBLE WITH WATER AND IN WHICH THE CONDENSATION PRODUCT IS NEITHER SOLUBLE NOR SWELLABLE, SAID ORGANIC SOLVENT BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON, CYCLOHEXANOL, AND CYCLOHEXANONE.
Claim 2
Dependent Claim
67 words
IN A PROCESS FOR MANUFACTURING ANION-EXCHANGE RESINS BY CONDENSATION OF A POLYETHYLENE IMINE WITH AN EPIHALOHYDRIN IN AN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID CONDENSATION IN THE PRESENCE OF AN ORGANIC SOLVENT WHICH IS IMMISCIBLE WITH WATER AND IN WHICH THE CONDENSATION PRODUCT IS NEITHER SOLUBLE NOR SWELLABLE, SAID ORGANIC SOLVENT BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON, CYCLOHEXANOL, AND CYCLOHEXANONE.
References Cited (Backward Citations)
FR849122A
Cited
GB1205505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |