Patent US3207770A successfully refreshed from Google Patents.
US3207770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl aluminum compounds
Assignee: ZIEGLER AG
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Filing: 1956-03-23
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Granted: 1965-09-21
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Expires: 1976-03-23
Abstract
No abstract record available.
Inventors
- 👤 Ziegler Karl
- 👤 Gellert Hans-Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:03
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
34 words
IN THE PRODUCTION OF ALKYL ALUMINUM COMPOUNDS, THE IMPROVEMENT COMPRISING REACTING ALUMINUM, ALUMINUM TRIALKYL, AND HYDROGEN BY HEATING THE SAME AT A PRESSURE OF AT LEAST 20 ATMOSPHERES TO THEREBY OBTAIN DIALKYL ALUMINUM HYDRIDE.
Claim 2
Dependent Claim
34 words
IN THE PRODUCTION OF ALKYL ALUMINUM COMPOUNDS, THE IMPROVEMENT COMPRISING REACTING ALUMINUM, ALUMINUM TRIALKYL, AND HYDROGEN BY HEATING THE SAME AT A PRESSURE OF AT LEAST 20 ATMOSPHERES TO THEREBY OBTAIN DIALKYL ALUMINUM HYDRIDE.
Claim 3
Dependent Claim
68 words
A PROCESS OF ACTIVATION OF ALUMINUM USEFUL IN THE PREPARATION OF ORGANIC COMPOUNDS, COMPRISING HEATING INACTIVE ALUMINUM IN THE PRESENCE OF HYDROGEN AND A COMPOUND HAVING THE FORMULA R2ALY, IN WHICH R IS CHOSEN FROM THE CLASS CONSISTING OF HYDROGEN AND ALKYL AND ARYL RADICALS; AND Y IS CHOSEN FROM THE CLASS CONSISTING OF ALKYL AND ARYL RADICALS AT A TEMPERATURE BETWEEN ABOUT 150 AND 200 DEGREES C.
Claim 4
Dependent Claim
68 words
A PROCESS OF ACTIVATION OF ALUMINUM USEFUL IN THE PREPARATION OF ORGANIC COMPOUNDS, COMPRISING HEATING INACTIVE ALUMINUM IN THE PRESENCE OF HYDROGEN AND A COMPOUND HAVING THE FORMULA R2ALY, IN WHICH R IS CHOSEN FROM THE CLASS CONSISTING OF HYDROGEN AND ALKYL AND ARYL RADICALS; AND Y IS CHOSEN FROM THE CLASS CONSISTING OF ALKYL AND ARYL RADICALS AT A TEMPERATURE BETWEEN ABOUT 150 AND 200 DEGREES C.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |