Patent US3257455A successfully refreshed from Google Patents.
US3257455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of boron hydrides and amine boranes
Assignee: Ethyl Corp
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Filing: 1963-04-26
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Granted: 1966-06-21
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Expires: 1983-04-26
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Ashby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:57
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C01; C01B; C01B35/00; C01B35/02; C01B35/026; C01B6/00; C07F5/00; C07F5/02; C07F9/66; C07F9/70; C07F9/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS FOR THE PREPARATION OF HYDRIDES OF BORON CHARACTERIZED BY THE STEP OF REACTING TOGETHER (1) A FULLY ESTERIFIED ESTER OF AN OXYACID OF BORON IN WHICH (A) THE BORON IS BONDED SOLELY TO OXYGEN ATOMS AND (B) ALL OF THE ESTERIFYING GROUPS ARE HYDROCARBYL GROUPS, (2) A LIGHT METAL ALUMINUM HYDRIDE IN WHICH SAID METAL IS A LIGHT METAL OF ATOMIC NUMBER 3 THROUGH 56, AND (3) A HYDROCARBYL COMPOUND OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF NITROGEN, PHOSPHORUS, AND ARSENIC, SAID HYDROCARBYL COMPOUND BEING FURTHER CHARACTERIZED BY CONTAINING THREE MONOVALENT RADICALS DIRECTLY AFFIXED TO SAID ELEMENT, FROM 1 TO 3 OF SAID RADICALS BEING HYDROCARBYL RADICALS AND FROM 0 TO 2 OF SAID RADICALS, BEING HYDROGEN.
Claim 2
Dependent Claim
121 words
A PROCESS FOR THE PREPARATION OF HYDRIDES OF BORON CHARACTERIZED BY THE STEP OF REACTING TOGETHER (1) A FULLY ESTERIFIED ESTER OF AN OXYACID OF BORON IN WHICH (A) THE BORON IS BONDED SOLELY TO OXYGEN ATOMS AND (B) ALL OF THE ESTERIFYING GROUPS ARE HYDROCARBYL GROUPS, (2) A LIGHT METAL ALUMINUM HYDRIDE IN WHICH SAID METAL IS A LIGHT METAL OF ATOMIC NUMBER 3 THROUGH 56, AND (3) A HYDROCARBYL COMPOUND OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF NITROGEN, PHOSPHORUS, AND ARSENIC, SAID HYDROCARBYL COMPOUND BEING FURTHER CHARACTERIZED BY CONTAINING THREE MONOVALENT RADICALS DIRECTLY AFFIXED TO SAID ELEMENT, FROM 1 TO 3 OF SAID RADICALS BEING HYDROCARBYL RADICALS AND FROM 0 TO 2 OF SAID RADICALS, BEING HYDROGEN.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |