US2615924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying glycerin
Assignee: Illinois Water Treatment Co
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Filing: 1950-08-31
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Granted: 1952-10-28
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Expires: 1970-08-31
Abstract
No abstract record available.
Inventors
- 👤 August C Reents
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:30
CPC Classifications
C; C11; C11D; C11D19/00; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE METHOD OF PURIFYING GLYCERIN SOLUTION WHICH INCLUDES THE STEPS OF CONTACTING THE SOLUTION WITH CATION AND ANION EXCHANGE MATERIALS AND THEREAFTER PASSING THE EFFLUENT THROUGH A BODY COMPRISING A SUBSTANTIALLY HOMOGENEOUS MIXTURE OF A CATION EXCHANGE MATERIAL AND A STRONGLY BASIC ANION EXCHANGE MATERIAL COMPRISING A QUATERNIZED POLYMERIZATION PRODUCT OF STYRENE AND DIVINYL BENZENE CONTAINING AN AMMONIUM GROUP.
Claim 2
Independent Claim
59 words
THE METHOD OF PURIFYING GLYCERIN SOLUTION WHICH INCLUDES THE STEPS OF CONTACTING THE SOLUTION WITH CATION AND ANION EXCHANGE MATERIALS AND THEREAFTER PASSING THE EFFLUENT THROUGH A BODY COMPRISING A SUBSTANTIALLY HOMOGENEOUS MIXTURE OF A CATION EXCHANGE MATERIAL AND A STRONGLY BASIC ANION EXCHANGE MATERIAL COMPRISING A QUATERNIZED POLYMERIZATION PRODUCT OF STYRENE AND DIVINYL BENZENE CONTAINING AN AMMONIUM GROUP.
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |