US2724728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ethers
Assignee: Sunoco Inc
•
Filing: 1950-12-19
•
Granted: 1955-11-22
•
Expires: 1970-12-19
Abstract
No abstract record available.
Inventors
- 👤 Robert M Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:21
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
PROCESS OF PREPARING ETHERS WHICH COMPRISES BRINGING TOGETHER AN ALKYL FLUORIDE AND BORON FLUORIDE IN THE PRESENCE OF WATER AND A SILICA-ALUMINA CATALYST, WHEREIN THE QUANTITY OF WATER IS NOT ABOVE 10% BY WEIGHT OF THE SILICA-ALUMINA CATALYST.
Claim 2
Dependent Claim
38 words
PROCESS OF PREPARING ETHERS WHICH COMPRISES BRINGING TOGETHER AN ALKYL FLUORIDE AND BORON FLUORIDE IN THE PRESENCE OF WATER AND A SILICA-ALUMINA CATALYST, WHEREIN THE QUANTITY OF WATER IS NOT ABOVE 10% BY WEIGHT OF THE SILICA-ALUMINA CATALYST.
References Cited (Backward Citations)
US2135455A
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US2237241A
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US2486368A
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US2484702A
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US2457882A
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US2428741A
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US2471130A
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US2516403A
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US2494510A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |