US2587753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for purifying alcohols
Assignee: Stanolind Oil and Gas Co
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Filing: 1949-04-26
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Granted: 1952-03-04
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Expires: 1969-04-26
Abstract
No abstract record available.
Inventors
- 👤 O'connor Buell
- 👤 Frank G Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:55
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN IMPROVEMENT IN THE BORATION PROCESS FOR PURIFYING A CRUDE ALCOHOL EMPLOYING RADICAL INTERCHANGE BETWEEN AN ALCOHOL AND A BORATE ESTER OF ANOTHER ALCOHOL, WHICH IMPROVEMENT COMPRISES EFFECTING SAID RADICAL INTERCHANGE BY COUNTERCURRENTLY CONTACTING AN ALCOHOL WITH A BORATE ESTER OF ANOTHER ALCOHOL IN A DISTILLATION ZONE UNDER EXTRACTIVE DISTILLATION CONDITIONS, AND SEPARATELY WITHDRAWING FROM SAID DISTILLATION ZONE THE ALCOHOL AND THE BORATE ESTER RESULTING FROM SAID RADICAL INTERCHANGE.
Claim 2
Dependent Claim
69 words
AN IMPROVEMENT IN THE BORATION PROCESS FOR PURIFYING A CRUDE ALCOHOL EMPLOYING RADICAL INTERCHANGE BETWEEN AN ALCOHOL AND A BORATE ESTER OF ANOTHER ALCOHOL, WHICH IMPROVEMENT COMPRISES EFFECTING SAID RADICAL INTERCHANGE BY COUNTERCURRENTLY CONTACTING AN ALCOHOL WITH A BORATE ESTER OF ANOTHER ALCOHOL IN A DISTILLATION ZONE UNDER EXTRACTIVE DISTILLATION CONDITIONS, AND SEPARATELY WITHDRAWING FROM SAID DISTILLATION ZONE THE ALCOHOL AND THE BORATE ESTER RESULTING FROM SAID RADICAL INTERCHANGE.
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) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |