US2862857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic distillation of monohydric and dihydric phenols
Assignee: Hercules Powder Co
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Filing: 1954-07-01
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Granted: 1958-12-02
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Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Leo J Filar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:56
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/74; C07C37/78; C07C37/08; C07C37/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A PROCESS FOR THE MANUFACTURE AND RECOVERY OF DIHYDRIC AND MONOHYDRIC PHENOLS WHICH COMPRISES SUBJECTING SAID CATALYZED DECOMPOSITION A REACTION MIXTURE CONTAINING A DIHYDROPEROXIDE AND A MONOHYDROPEROXIDE OBTAINED BY OXIDATION OF A COMPOUND OF A FORMULA OF THE GROUP CONSISTING OF
Claim 2
Dependent Claim
41 words
A PROCESS FOR THE MANUFACTURE AND RECOVERY OF DIHYDRIC AND MONOHYDRIC PHENOLS WHICH COMPRISES SUBJECTING SAID CATALYZED DECOMPOSITION A REACTION MIXTURE CONTAINING A DIHYDROPEROXIDE AND A MONOHYDROPEROXIDE OBTAINED BY OXIDATION OF A COMPOUND OF A FORMULA OF THE GROUP CONSISTING OF
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |