Patent US2666771A successfully refreshed from Google Patents.
US2666771A
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Catalyzing organic isomerization reactions with active magnesia
Assignee: FMC Corp
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Filing: 1948-12-09
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Granted: 1954-01-19
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Expires: 1968-12-09
Abstract
No abstract record available.
Inventors
- 👤 Albert C Zettlemoyer
- 👤 William C Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:53
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2512
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN THE PROCESS OF ISOMERIZING AN UNSATURATED CARBON COMPOUND CONTAINING AT LEAST ONE CARBON-TO-CARBON DOUBLE BOND, THE IMPROVEMENT COMPRISING HEATING THE COMPOUND IN THE PRESENCE OF A CATALYST COMPRISING ACTIVE MAGNESIA HAVING AN IODINE VALUE OF AT LEAST 30, AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO EFFECT SUBSTANTIAL ISOMERIZATION OF THE COMPOUND AND CONSEQUENT RELOCATION OF THE DOUBLE BOND.
Claim 2
Dependent Claim
61 words
IN THE PROCESS OF ISOMERIZING AN UNSATURATED CARBON COMPOUND CONTAINING AT LEAST ONE CARBON-TO-CARBON DOUBLE BOND, THE IMPROVEMENT COMPRISING HEATING THE COMPOUND IN THE PRESENCE OF A CATALYST COMPRISING ACTIVE MAGNESIA HAVING AN IODINE VALUE OF AT LEAST 30, AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO EFFECT SUBSTANTIAL ISOMERIZATION OF THE COMPOUND AND CONSEQUENT RELOCATION OF THE DOUBLE BOND.
References Cited (Backward Citations)
US1495776A
Cited
US2234367A
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US2219725A
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US2219726A
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US2410890A
Cited
US2447181A
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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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |