US2987537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing alkyl borate esters
Assignee: US Borax Inc
•
Filing: 1958-04-07
•
Granted: 1961-06-06
•
Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Allen L Mccloskey
- 👤 Robert J Brotherton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF CONTINUOUSLY PRODUCING AT LEAST A 90% YIELD OF ALKYL BORATE ESTERS WHICH COMPRISES CONTINUOUSLY FEEDING 4 MOLES OF TRIMETHYL BORATE AND FROM 2.8 TO 3.4 MOLES OF AN ABSOLUTE ALCOHOL HAVING FROM 2-4 CARBON ATOMS INTO A FRACTIONATING COLUMN, CONTINUOUSLY REMOVING FROM THE TOP OF THE COLUMN AN AZEOTROPE OF METHANOL-TRIMETHYL BORATE AND CONTINUOUSLY REMOVING FROM THE BOTTOM OF THE COLUMN AN AT LEAST 90% PURE TRIALKYL BORATE ESTER OF AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYL, ISOPROPYL, N-PROPYL AND T-BUTYL.
Claim 2
Independent Claim
86 words
THE METHOD OF CONTINUOUSLY PRODUCING AT LEAST A 90% YIELD OF ALKYL BORATE ESTERS WHICH COMPRISES CONTINUOUSLY FEEDING 4 MOLES OF TRIMETHYL BORATE AND FROM 2.8 TO 3.4 MOLES OF AN ABSOLUTE ALCOHOL HAVING FROM 2-4 CARBON ATOMS INTO A FRACTIONATING COLUMN, CONTINUOUSLY REMOVING FROM THE TOP OF THE COLUMN AN AZEOTROPE OF METHANOL-TRIMETHYL BORATE AND CONTINUOUSLY REMOVING FROM THE BOTTOM OF THE COLUMN AN AT LEAST 90% PURE TRIALKYL BORATE ESTER OF AN ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYL, ISOPROPYL, N-PROPYL AND T-BUTYL.
References Cited (Backward Citations)
US2587753A
Cited
US2813115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |