US2859186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous trimethylol phenol-phenolpolyamine condensation products with anion exchanging properties
Assignee: Bayer AG
•
Filing: 1955-05-06
•
Granted: 1958-11-04
•
Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
- 👤 Boresch Carl
- 👤 Hagge Walter
- 👤 Quaedvlieg Mathieu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:55
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PREPARING AN ANION-EXCHANGE RESIN WHICH COMPRISES CONTACTING 1 MOL OF A MONOHYDRIC PHENOL CAPABLE OF FORMING A TRIMETHYLOL DERIVATIVE IN AN AQUEOUS CASTIC ALKALINE SOLUTION WITH ABOUT 3.5-44.5 MOLS OF FORMALDEHYDE TO PRODUCE AN AQUEOUS SOLUTION OF THE TRIMETHYLOL DERIVATIVE OF SAID MONOHYDRIC PHENOL, MIXING ABOUT 1 MOLE OF A MONOHYDRIC PHENOL IN WHICH AT LEAST TWO OF THE HYDROGEN TOMS IN P- AND O-POSITION TO THE PHENOLIC HYDROXYL GROUP ARE UNSUBSTITUTED AND ABOUT 1-5 MOLS OF AN ALKYLENE POLYAMINE WITH SAID SOLUTION THEREAFTER HEATING SAID SOLUTION TO TEMPERATURES OF ABOUT 50 TO 100*C. TO CONVERT SAID SOLUTION INTO A GEL AND DRYING SAID GEL TO PRODUCE A RESIN WITH ANION EXCHANGE PROPERTIES.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PREPARING AN ANION-EXCHANGE RESIN WHICH COMPRISES CONTACTING 1 MOL OF A MONOHYDRIC PHENOL CAPABLE OF FORMING A TRIMETHYLOL DERIVATIVE IN AN AQUEOUS CASTIC ALKALINE SOLUTION WITH ABOUT 3.5-44.5 MOLS OF FORMALDEHYDE TO PRODUCE AN AQUEOUS SOLUTION OF THE TRIMETHYLOL DERIVATIVE OF SAID MONOHYDRIC PHENOL, MIXING ABOUT 1 MOLE OF A MONOHYDRIC PHENOL IN WHICH AT LEAST TWO OF THE HYDROGEN TOMS IN P- AND O-POSITION TO THE PHENOLIC HYDROXYL GROUP ARE UNSUBSTITUTED AND ABOUT 1-5 MOLS OF AN ALKYLENE POLYAMINE WITH SAID SOLUTION THEREAFTER HEATING SAID SOLUTION TO TEMPERATURES OF ABOUT 50 TO 100*C. TO CONVERT SAID SOLUTION INTO A GEL AND DRYING SAID GEL TO PRODUCE A RESIN WITH ANION EXCHANGE PROPERTIES.
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |