Patent US3170787A successfully refreshed from Google Patents.
US3170787A
Expired / Lapsed
US
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Process for the production of aluminum
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1962-10-08
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Granted: 1965-02-23
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Expires: 1982-10-08
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Ryoma
- 👤 Yurimoto Juntaro
- 👤 Ryu Hirosuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:01
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR THE PRODUCTION OF ALUMINUM, WHICH COMPRISES HEATING AT LEAST ONE ALKYLALUMINUM COMPOUND HAVING THE GENERAL FORMUAL OF (R2R2CH-CH2)2AIX, WHEREIN R2 AND R2 ARE EACH SELECTED FROM THE GROUP SISTING OF HYDROGEN ATOM AND ALKYL RADICALS AND X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN ATOM AND R1R2CH-CH2- RADICALS AT A TEMPERATURE BETWEEN 200* C. AND 300*C., WHILE IN THE FORM OF A LIQUID IN A HEATING ZONE, TO THERMALLY DECOMPOSE THE SAID ALKYLALUMINUM COMPOUND TO GIVE ALUMINUM, HYDROGEN AND OLEFIN, WHILE KEEPING THE DECOMPOSITION RATE OF THE SAID ALKYLALUMIUM COMPOUND AT A RATE OF MORE THAN 3% IN MOLE PER MINUTE BASED UPON THE TOTAL NUMBER OF MOLES OF THE SAID ALKYLALUMINUM COMPOUND PRESENT IN THE SAID HEATING ZONE, BY MEASURING THE VOLUME OF THE GENERATED GAS DURING THE DECOMPOSITION REACTION.
Claim 2
Dependent Claim
135 words
A PROCESS FOR THE PRODUCTION OF ALUMINUM, WHICH COMPRISES HEATING AT LEAST ONE ALKYLALUMINUM COMPOUND HAVING THE GENERAL FORMUAL OF (R2R2CH-CH2)2AIX, WHEREIN R2 AND R2 ARE EACH SELECTED FROM THE GROUP SISTING OF HYDROGEN ATOM AND ALKYL RADICALS AND X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN ATOM AND R1R2CH-CH2- RADICALS AT A TEMPERATURE BETWEEN 200* C. AND 300*C., WHILE IN THE FORM OF A LIQUID IN A HEATING ZONE, TO THERMALLY DECOMPOSE THE SAID ALKYLALUMINUM COMPOUND TO GIVE ALUMINUM, HYDROGEN AND OLEFIN, WHILE KEEPING THE DECOMPOSITION RATE OF THE SAID ALKYLALUMIUM COMPOUND AT A RATE OF MORE THAN 3% IN MOLE PER MINUTE BASED UPON THE TOTAL NUMBER OF MOLES OF THE SAID ALKYLALUMINUM COMPOUND PRESENT IN THE SAID HEATING ZONE, BY MEASURING THE VOLUME OF THE GENERATED GAS DURING THE DECOMPOSITION REACTION.
References Cited (Backward Citations)
US2843474A
Cited
US2867546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |