Patent US2605293A successfully refreshed from Google Patents.
US2605293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of glycerine
Assignee: Shell Development Co
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Filing: 1951-04-26
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Granted: 1952-07-29
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Expires: 1971-04-26
Abstract
No abstract record available.
Inventors
- 👤 Francis T Tymstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:44
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN A PROCESS WHEREIN AN AQUEOUS SOLUTION OF DICHLOROHYDRIN ISOMERS IS HYDROLYZED TO GLYCERINE, THE STEPS COMPRISING DIVERTING FROM ABOUT 20 TO 75% OF SAID SOLUTION THROUGH A UNIT WHEREIN SAID DICHLOROHYDRIN ISOMERS ARE CONVERTED TO EPICHLOROHYDRIN, COMBINING THE EPICHLOROHYDRIN FORMED IN SAID UNIT WITH THE UNDIVERTED PORTION OF SAID DICHLOROHYDRIN SOLUTION, AND HYDROLYZING THE CHLOROHYDRINS PRESENT IN THE RESULTING SOLUTION TO GLYCERINE.
Claim 2
Dependent Claim
63 words
IN A PROCESS WHEREIN AN AQUEOUS SOLUTION OF DICHLOROHYDRIN ISOMERS IS HYDROLYZED TO GLYCERINE, THE STEPS COMPRISING DIVERTING FROM ABOUT 20 TO 75% OF SAID SOLUTION THROUGH A UNIT WHEREIN SAID DICHLOROHYDRIN ISOMERS ARE CONVERTED TO EPICHLOROHYDRIN, COMBINING THE EPICHLOROHYDRIN FORMED IN SAID UNIT WITH THE UNDIVERTED PORTION OF SAID DICHLOROHYDRIN SOLUTION, AND HYDROLYZING THE CHLOROHYDRINS PRESENT IN THE RESULTING SOLUTION TO GLYCERINE.
References Cited (Backward Citations)
US1477113A
Cited
US2061377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |