Patent US4245500A successfully refreshed from Google Patents.
Patent US3318931A successfully refreshed from Google Patents.
US3318931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing alkylgalliums
Assignee: Siemens Schuckertwerke AG
•
Filing: 1961-05-10
•
Granted: 1967-05-09
•
Expires: 1981-05-10
Abstract
No abstract record available.
Inventors
- 👤 Dotzer Richard
- 👤 Engelbrecht Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:46
CPC Classifications
C; C07; C07F; C07F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF PRODUCING TRIISOBUTYLGALLIUM, WHICH COMPRISES SLOWLY ADDING, IN A MOLAR RATIO ABOUT 1:3, ETHOXYDIISOBUTYLGALLIUM, IN A SUITABLE ORGANIC SOLVENT, TO WARMED TRIISOBUTYLALUMINUM, DISTILLING OFF SAID SOLVENT, THEREAFTER FRACTIONALLY DISTILLING THE REST OF THE REACTION MIXTURE TO RECOVER TRIISOBUTYLGALLIUM.
Claim 2
Independent Claim
40 words
THE METHOD OF PRODUCING TRIISOBUTYLGALLIUM, WHICH COMPRISES SLOWLY ADDING, IN A MOLAR RATIO ABOUT 1:3, ETHOXYDIISOBUTYLGALLIUM, IN A SUITABLE ORGANIC SOLVENT, TO WARMED TRIISOBUTYLALUMINUM, DISTILLING OFF SAID SOLVENT, THEREAFTER FRACTIONALLY DISTILLING THE REST OF THE REACTION MIXTURE TO RECOVER TRIISOBUTYLGALLIUM.
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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |