Patent US2813115A successfully refreshed from Google Patents.
US2813115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of methyl borate
Assignee: Metal Hydrides Inc
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Filing: 1956-01-06
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Granted: 1957-11-12
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Expires: 1976-01-06
Abstract
No abstract record available.
Inventors
- 👤 Robert W Bragdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:54
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A METHOD FOR PRODUCING TRIMETHYL BORATE, THE STEPS WHICH COMPRISE FORMING A METHANOL SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND BORIC OXIDE, CONTINUOUSLY FEEDING SAID SOLUTION INTO AN INTERMEDIATE PORTION OF A VERTICALLY POSITIONED FRACTIONATING COLUMN, CONTINUOUSLY REMOVING FROM THE COLUMN BY FRACTIONAL DISTILLATION AN ANHYDROUS MIXTURE OF METHANOL AND TRIMETHYL BORATE, CONTINUOUSLY REMOVING LIQUOR FROM THE BOTTOM OF THE COLUMN, AND ESTABLISHING AND MAINTAINING A REFLUX RATIO IN THE COLUMN BELOW SAID INTERMEDIATE PORTION SUCH THAT THE LIQUOR REMOVED FROM THE BOTTOM OF THE COLUMN IS SUBSTANTIALLY FREE OF BORON AND CONSISTS ESSENTIALLY OF METHANOL AND WATER.
Claim 2
Dependent Claim
105 words
IN A METHOD FOR PRODUCING TRIMETHYL BORATE, THE STEPS WHICH COMPRISE FORMING A METHANOL SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND BORIC OXIDE, CONTINUOUSLY FEEDING SAID SOLUTION INTO AN INTERMEDIATE PORTION OF A VERTICALLY POSITIONED FRACTIONATING COLUMN, CONTINUOUSLY REMOVING FROM THE COLUMN BY FRACTIONAL DISTILLATION AN ANHYDROUS MIXTURE OF METHANOL AND TRIMETHYL BORATE, CONTINUOUSLY REMOVING LIQUOR FROM THE BOTTOM OF THE COLUMN, AND ESTABLISHING AND MAINTAINING A REFLUX RATIO IN THE COLUMN BELOW SAID INTERMEDIATE PORTION SUCH THAT THE LIQUOR REMOVED FROM THE BOTTOM OF THE COLUMN IS SUBSTANTIALLY FREE OF BORON AND CONSISTS ESSENTIALLY OF METHANOL AND WATER.
References Cited (Backward Citations)
US2217354A
Cited
US2587753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |