Patent US2903469A successfully refreshed from Google Patents.
US2903469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: Distillers Co Yeast Ltd
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Filing: 1957-07-15
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Granted: 1959-09-08
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Hawkins Edwin George Edward
- 👤 Watt Irene Marianne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:30
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PROCESS FOR THE PRODUCTION OF AN ALUMINIUM ALKYL SESQUICHLORIDE BY THE REACTION OF ALUMINIUM WITH AN ALKYL CHLORIDE, SAID ALKYL CHLORIDE CONTAINING A MAXIMUM OF FOUR CARBON ATOMS, THE IMPROVEMENT OF REACTING THE ALUMINIUM WITH THE ALKYL CHLORIDE IN THE PRESENCE FROM THE BEGINNING AND THROUGHOUT THE REACTION OF AN ADDED REACTION INITIATOR CONSISTING OF A MIXTURE OF ALUMINIUM CHLORIDE AND AN ALUMINIUM ALKYL HALIDE.
Claim 2
Dependent Claim
67 words
IN A PROCESS FOR THE PRODUCTION OF AN ALUMINIUM ALKYL SESQUICHLORIDE BY THE REACTION OF ALUMINIUM WITH AN ALKYL CHLORIDE, SAID ALKYL CHLORIDE CONTAINING A MAXIMUM OF FOUR CARBON ATOMS, THE IMPROVEMENT OF REACTING THE ALUMINIUM WITH THE ALKYL CHLORIDE IN THE PRESENCE FROM THE BEGINNING AND THROUGHOUT THE REACTION OF AN ADDED REACTION INITIATOR CONSISTING OF A MIXTURE OF ALUMINIUM CHLORIDE AND AN ALUMINIUM ALKYL HALIDE.
References Cited (Backward Citations)
US2744127A
Cited
US2691668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |