Patent US3107157A successfully refreshed from Google Patents.
US3107157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of alkali metal borohydrides
Assignee: Callery Chemical Co
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Filing: 1955-07-06
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Granted: 1963-10-15
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Expires: 1975-07-06
Abstract
No abstract record available.
Inventors
- 👤 Henry P Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:23
CPC Classifications
C; C01; C01B; C01B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD OF PURIFYING CRUDE SODIUM BOROHYDRIDE WHICH COMPRISES ADDING TO A SATURATED SOLUTION OF SAID BOROHYDRIDE IN A NON-AQUEOUS SOLBENT IN WHICH SAID SODIUM BOROHYDRIDE IS SOLUBLE SELECTED FROM THE GROUP CONSISTING OF ANHYDROUS AMMONIA, LOWER ALKYL AMINES, MORPHOLINE AND PYRIDINE ANOTHER NON-AQUEOUS SOLVENT WHICH IS MISCIBLE WITH THE BOROHYDRIDE SOLUTION BUT IN WHICH SODIUM BOROHYDRIDE IS INSOLUBLE SELECTED FROM THE GROUP CONSISTING OF BENZENE AND ETHERS THAT CONTAIN ONLY ONE ETHER LINKAGE, AND RECOVERING THE PURE SODIUM BOROHYDRIDE WHICH PRECIPITATES.
Claim 2
Independent Claim
82 words
A METHOD OF PURIFYING CRUDE SODIUM BOROHYDRIDE WHICH COMPRISES ADDING TO A SATURATED SOLUTION OF SAID BOROHYDRIDE IN A NON-AQUEOUS SOLBENT IN WHICH SAID SODIUM BOROHYDRIDE IS SOLUBLE SELECTED FROM THE GROUP CONSISTING OF ANHYDROUS AMMONIA, LOWER ALKYL AMINES, MORPHOLINE AND PYRIDINE ANOTHER NON-AQUEOUS SOLVENT WHICH IS MISCIBLE WITH THE BOROHYDRIDE SOLUTION BUT IN WHICH SODIUM BOROHYDRIDE IS INSOLUBLE SELECTED FROM THE GROUP CONSISTING OF BENZENE AND ETHERS THAT CONTAIN ONLY ONE ETHER LINKAGE, AND RECOVERING THE PURE SODIUM BOROHYDRIDE WHICH PRECIPITATES.
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) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |