US2628986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alcohol purification process
Assignee: Shell Development Co
•
Filing: 1949-10-29
•
Granted: 1953-02-17
•
Expires: 1969-10-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin G Wallace
- 👤 Jacob J Menn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:35
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/916
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A PROCESS FOR IMPROVING THE ODOR OF ISOPROPANOL PRODUCED BY THE CATALYTIC HYDRATION OF PROPYLENE AND PURIFIED TO A PLURITY OF AT LEAST 85%, THE BALANCE BEING ESSENTIALLY WATER TOGETHER WITH TRACES OF ORGANIC IMPURITIES LARGELY NON-IONIC IN CHARACTER BY FRACTIONAL DISTILLATION, THE STEP COMPRISING REFLUXING THE FRACTIONALLY DISTILLED ISOPROPANOL IN THE PRESENCE OF FROM ABOUT 0.1 TO 5 MOL PERCENT OF AN OXIDIZING AGENT, AND THEREAFTER BRINGING THE ISOPROPANOL INTO THE INTIMATE CONTACT WITH AN ION EXCHANGER RESIN.
Claim 2
Dependent Claim
80 words
IN A PROCESS FOR IMPROVING THE ODOR OF ISOPROPANOL PRODUCED BY THE CATALYTIC HYDRATION OF PROPYLENE AND PURIFIED TO A PLURITY OF AT LEAST 85%, THE BALANCE BEING ESSENTIALLY WATER TOGETHER WITH TRACES OF ORGANIC IMPURITIES LARGELY NON-IONIC IN CHARACTER BY FRACTIONAL DISTILLATION, THE STEP COMPRISING REFLUXING THE FRACTIONALLY DISTILLED ISOPROPANOL IN THE PRESENCE OF FROM ABOUT 0.1 TO 5 MOL PERCENT OF AN OXIDIZING AGENT, AND THEREAFTER BRINGING THE ISOPROPANOL INTO THE INTIMATE CONTACT WITH AN ION EXCHANGER RESIN.
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) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |