US2735871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of aralkyl hydroperoxides
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
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Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:57
CPC Classifications
C; C07; C07C; C07C407/00; C07C407/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE METHOD OF TREATING IMPURE ARALKYL HYDROPEROXIDE CONTAINING OXYGEN-CONTAINING ORGANIC IMPURITIES IN ORDER TO INCREASE THE PURITY THEREOF WHICH COMPRISES CONTACTING SAID ARALKYL HYDROPEROXIDE WITH HYDROGEN PEROXIDE IN THE PRESENCE OF AN ACID HAVING A DISSOCIATION CONSTANT OF AT LEAST 10-3 AT A TEMPERATURE IN THE RANGE OF FROM ABOUT -60 TO ABOUT 35* C., MAINTAINING SAID HYDROPEROXIDE AT A TEMPERATURE BELOW ABOUT 35* C. AT ALL TIMES WHILE IN CONTACT WITH SAID ACID, AND CORRELATING THE TIME OF CONTACT OF SAID ACID WITH SAID HYDROPEROXIDE AND THE TEMPERATURE AT WHICH THE RESULTING MIXTURE IS MAINTAINED TO EFFECT SAID TREATMENT IN THE ABSENCE OF ANY SUBSTANTIAL CUMENE HYDROPEROXIDE DECOMPOSITION.
Claim 2
Independent Claim
109 words
THE METHOD OF TREATING IMPURE ARALKYL HYDROPEROXIDE CONTAINING OXYGEN-CONTAINING ORGANIC IMPURITIES IN ORDER TO INCREASE THE PURITY THEREOF WHICH COMPRISES CONTACTING SAID ARALKYL HYDROPEROXIDE WITH HYDROGEN PEROXIDE IN THE PRESENCE OF AN ACID HAVING A DISSOCIATION CONSTANT OF AT LEAST 10-3 AT A TEMPERATURE IN THE RANGE OF FROM ABOUT -60 TO ABOUT 35* C., MAINTAINING SAID HYDROPEROXIDE AT A TEMPERATURE BELOW ABOUT 35* C. AT ALL TIMES WHILE IN CONTACT WITH SAID ACID, AND CORRELATING THE TIME OF CONTACT OF SAID ACID WITH SAID HYDROPEROXIDE AND THE TEMPERATURE AT WHICH THE RESULTING MIXTURE IS MAINTAINED TO EFFECT SAID TREATMENT IN THE ABSENCE OF ANY SUBSTANTIAL CUMENE HYDROPEROXIDE DECOMPOSITION.
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |