Patent US2534533A successfully refreshed from Google Patents.
US2534533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of preparing alkali metal borohydrides
Assignee: Individual
•
Filing: 1945-11-05
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Granted: 1950-12-19
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Expires: 1965-11-05
Abstract
No abstract record available.
Inventors
- 👤 Hermann I Schlesinger
- 👤 Herbert C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:26
CPC Classifications
C; C01; C01B; C01B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE METHOD OF PREPARING AN ALKALI METAL BOROHYDRIDE WHICH COMPRISES HEATING AN ALKALI METAL HYDRIDE AT A TEMPERATURE NOT SUBSTANTIALLY LESS THAN 200*C WITH A MEMBER OF THE CLASS CONSISTING OF ALKYL BORATES, ALKOXY BOROHYDRIDES AND BORIC OXIDE, THE PROPORTION FO ALKALI METAL HYDRIDE BEING IN EXCESS OF ONE MOLE OF THE ALKALI METAL HYDRIDE PER MOLE OF SAID MEMBER OF SAID CLASS.
Claim 2
Independent Claim
63 words
THE METHOD OF PREPARING AN ALKALI METAL BOROHYDRIDE WHICH COMPRISES HEATING AN ALKALI METAL HYDRIDE AT A TEMPERATURE NOT SUBSTANTIALLY LESS THAN 200*C WITH A MEMBER OF THE CLASS CONSISTING OF ALKYL BORATES, ALKOXY BOROHYDRIDES AND BORIC OXIDE, THE PROPORTION FO ALKALI METAL HYDRIDE BEING IN EXCESS OF ONE MOLE OF THE ALKALI METAL HYDRIDE PER MOLE OF SAID MEMBER OF SAID CLASS.
References Cited (Backward Citations)
US2461661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |