Patent US2880144A successfully refreshed from Google Patents.
US2880144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic extractive distillation of
Assignee: —
•
Filing: —
•
Granted: 1959-03-31
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Expires: 1976-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:48
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD OF CONTINUOUSLY SEPARATING TRIMETHYL BORATE FROM ITS METHANOL AZEOTROPE WHICH COMPRISES MIXING THE AZEOTROPE WITH A HYDROCARBON OF THE GROUP CONSISTING OF 2-METHYL PENTANE, 3 METHYL PENTANE, 2.3-DIMETHYL BUTANE, 2,2-DIMETHYL BUTANE AND 3-METHYL, 1-PENTENE IN A FRACTIONATING COLUMN REMOVING THE RESULTING HYDROCARBON-METHANOL AZEOTROPE OVERHEAD BY DISTILLATION AND REMOVING SUBSTANTIALLY PURE TRIMETHYL BORATE FROM THE BOTTOM OF SAID COLUMN
Claim 2
Independent Claim
60 words
A METHOD OF CONTINUOUSLY SEPARATING TRIMETHYL BORATE FROM ITS METHANOL AZEOTROPE WHICH COMPRISES MIXING THE AZEOTROPE WITH A HYDROCARBON OF THE GROUP CONSISTING OF 2-METHYL PENTANE, 3 METHYL PENTANE, 2.3-DIMETHYL BUTANE, 2,2-DIMETHYL BUTANE AND 3-METHYL, 1-PENTENE IN A FRACTIONATING COLUMN REMOVING THE RESULTING HYDROCARBON-METHANOL AZEOTROPE OVERHEAD BY DISTILLATION AND REMOVING SUBSTANTIALLY PURE TRIMETHYL BORATE FROM THE BOTTOM OF SAID COLUMN
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |