Patent US3787504A successfully refreshed from Google Patents.
US3787504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing organic diperoxides
Assignee: Montedison SpA
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Filing: 1968-12-26
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Granted: 1974-01-22
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Expires: 1988-12-26
Abstract
Abstract AN ISOMERIC MIXTURE OF 60-70% OF 1,3- AND 40-30% OF 1,4-ISOMERS OF A,A''-BIS(DI-TERT.BUTYLPEROXY)DIISPROPYLBENZENE IS PREPARED BY REACTING AN ISOMERIC MIXTURE OF 60-70% OF 1,3- AND 40-30% OF 1,4-ISOMER OF A,A'' DIHYDROXY-DIISOPROPYLBENZENE WITH TERT.BUTYLHYDROPEROXIDE IN THE PRESENCE OF DI-TERT.BUTYLPEROXIDE SOLVENT AND SULFURIC ACID CATALYST.
Inventors
- 👤 C Peri
- 👤 S Fontani
- 👤 F Ladavas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:48
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/16; C07C407/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |