US2542746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying borohydrides of the alkali metals
Assignee: Metal Hydrides Inc
•
Filing: 1949-11-14
•
Granted: 1951-02-20
•
Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Mario D Banus
- 👤 Jr Thomas R P Gibb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:16
CPC Classifications
C; C01; C01B; C01B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A METHOD OF PREPARING SODIUM BOROHYDRIDE WHICH COMPRISES REACTING AN ALKYL BORATE WITH SODIUM HYDRIDE TO OBTAIN A REACTION PRODUCT COMPRISING SODIUM BOROHYDRIDE AND SODIUM ALKOXIDE, DISSOLVING THE SODIUM BOROHYDRIDE WITH A SOLVENT THEREFOR WHICH IS STABLE IN THE PRESENCE OF WATER AND WHICH IS A NON-SOLVENT FOR THE SODIUM ALKOXIDE, AND SEPARATING THE SOLUTION FROM THE INSOLUBLE MATERIAL, THE IMPROVEMENT WHICH COMPRISES INTRODUCING INTO THE SOLUTION OF THE BOROHYDRIDE AN AMOUNT OF WATER EFFECTIVE TO REACT WITH A PORTION OF THE IMPURITIES IN THE BOROHYDRIDE AND FORM A COMPOUND INSOLUBLE IN THE SOLUTION.
Claim 2
Dependent Claim
95 words
IN A METHOD OF PREPARING SODIUM BOROHYDRIDE WHICH COMPRISES REACTING AN ALKYL BORATE WITH SODIUM HYDRIDE TO OBTAIN A REACTION PRODUCT COMPRISING SODIUM BOROHYDRIDE AND SODIUM ALKOXIDE, DISSOLVING THE SODIUM BOROHYDRIDE WITH A SOLVENT THEREFOR WHICH IS STABLE IN THE PRESENCE OF WATER AND WHICH IS A NON-SOLVENT FOR THE SODIUM ALKOXIDE, AND SEPARATING THE SOLUTION FROM THE INSOLUBLE MATERIAL, THE IMPROVEMENT WHICH COMPRISES INTRODUCING INTO THE SOLUTION OF THE BOROHYDRIDE AN AMOUNT OF WATER EFFECTIVE TO REACT WITH A PORTION OF THE IMPURITIES IN THE BOROHYDRIDE AND FORM A COMPOUND INSOLUBLE IN THE SOLUTION.
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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |