US2671809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled decomposition of aralkyl hydroperoxides
Assignee: Shell Development Co
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Filing: 1952-03-04
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Granted: 1954-03-09
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Expires: 1972-03-04
Abstract
No abstract record available.
Inventors
- 👤 Fortuin Jan Pieter
- 👤 Waterman Hein Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
THE PROCESS FOR THE CONVERSION OF ALPHAALPHA-DIMETHYLBENZYLHYDROPEROXIDE TO A REACTION MIXTURE COMPRISING PHENOL AND ACETONE WHICH COMPRISES HEATING SAID ALPHA-ALPHA-DIMETHYLBENZYLHYDROPEROXIDE AT A TEMPERATURE OF FROM ABOUT 50* C. TO ABOUT 100* C. IN THE PRESENCE OF A SULFATE SALT OF A METAL SELECTED FROM THE DIDVALENT METALS OF THE RIGHT SUBGROUP OF GROUP I AND THE DIVALENT METALS OF GROUP 11 OF THE PERIODIC TABLE.
References Cited (Backward Citations)
GB626095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |