US2994586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of diborane
Assignee: Callery Chemical Co
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Filing: 1953-11-06
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Granted: 1961-08-01
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Expires: 1973-11-06
Abstract
No abstract record available.
Inventors
- 👤 George F Huff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:39
CPC Classifications
C; C01; C01B; C01B6/00; C01B6/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THAT METHOD OF SEPARATING DIBORANE FROM A MIXTURE WITH A VOLATILE ACID IMPURITY COMPRISING CONTACTING SAID MIXTURE WITH A METALLIC HYDRIDE IN A LOWER ALKYL ETHER OF A POLYALKYL GLYCOL OF THE FORMULA R(OCH2CH2)NOR WHERE R IS A LOWER ALKYL RADICAL AND N IS A WHOLE NUMBER FROM 2 THROUGH 4, INCLUSIVE AND THEREBY CONVERTING SAID ACID IMPURITY TO A NON-VOLATILE INORGANIC SALT, AND RECOVERING THE ACID-FREE DIBORANE.
Claim 2
Dependent Claim
68 words
THAT METHOD OF SEPARATING DIBORANE FROM A MIXTURE WITH A VOLATILE ACID IMPURITY COMPRISING CONTACTING SAID MIXTURE WITH A METALLIC HYDRIDE IN A LOWER ALKYL ETHER OF A POLYALKYL GLYCOL OF THE FORMULA R(OCH2CH2)NOR WHERE R IS A LOWER ALKYL RADICAL AND N IS A WHOLE NUMBER FROM 2 THROUGH 4, INCLUSIVE AND THEREBY CONVERTING SAID ACID IMPURITY TO A NON-VOLATILE INORGANIC SALT, AND RECOVERING THE ACID-FREE DIBORANE.
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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |