US2971017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of cyclopentadienyl indium compounds
Assignee: Union Carbide Corp
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Filing: 1958-05-29
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Granted: 1961-02-07
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 Fischer Ernst Otto
- 👤 Hermann P Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:07
CPC Classifications
C; C07; C07F; C07F5/00; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C23; C23C; C23C16/00; C23C16/06; C23C16/18; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS FOR THE PRODUCTION OF INDIUM COMPOUNDS HAVING THE FORMULA INR, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENYL AND LOWER ALKYLSUBSTITUTED CYCLOPENTADIENYL WHICH COMPRISES (1) REACTING IN APPROXIMATELY STOICHIOMETRIC QUANTITIES A COMPOUND OF TRIVALENT INDIUM SELECTED FROM THE GROUP CONSISTING OF INDIUM TRICHLORIDE AND INDIUM TRIBROMIDE WITH ANA ALKALI METAL DERIVATIVE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENE AND LOWER ALKYLSUBSTITUTED CYCLOPENTANDIENS IN A PALOR LIQUID ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ETHERS AND AMIENS TO GIVE A REACTION MIXTURE CONTAINING A COMPOUND OF THE FORMULA INR3, WHEREIN R HAS THE MEANING DEFINED HEREINABOVE, (2) REMOVING THE SOLVENT FROM SAID REACTION MIXTURE AND (3) RECOVERING SAID COMPOUND HAVING THE FORMULA INR FROM SAID SOLVENT-FREE REACTION MIXTURE BY SUBLIMATION UNDER VACUUM AT A TEMPERATURE BETWEEN ABOUT 130* C. AND ABOUT 180* C.
Claim 2
Dependent Claim
140 words
A PROCESS FOR THE PRODUCTION OF INDIUM COMPOUNDS HAVING THE FORMULA INR, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENYL AND LOWER ALKYLSUBSTITUTED CYCLOPENTADIENYL WHICH COMPRISES (1) REACTING IN APPROXIMATELY STOICHIOMETRIC QUANTITIES A COMPOUND OF TRIVALENT INDIUM SELECTED FROM THE GROUP CONSISTING OF INDIUM TRICHLORIDE AND INDIUM TRIBROMIDE WITH ANA ALKALI METAL DERIVATIVE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENE AND LOWER ALKYLSUBSTITUTED CYCLOPENTANDIENS IN A PALOR LIQUID ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF ETHERS AND AMIENS TO GIVE A REACTION MIXTURE CONTAINING A COMPOUND OF THE FORMULA INR3, WHEREIN R HAS THE MEANING DEFINED HEREINABOVE, (2) REMOVING THE SOLVENT FROM SAID REACTION MIXTURE AND (3) RECOVERING SAID COMPOUND HAVING THE FORMULA INR FROM SAID SOLVENT-FREE REACTION MIXTURE BY SUBLIMATION UNDER VACUUM AT A TEMPERATURE BETWEEN ABOUT 130* C. AND ABOUT 180* C.
References Cited (Backward Citations)
FR1080357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |