US2954411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of cyclopropanes
Assignee: Rohm and Haas Co
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Filing: 1959-06-19
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Granted: 1960-09-27
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Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Marion F Hawthorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:57
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/027; C07C; C07C1/00; C07C1/32; C07C1/321; C07C2601/00; C07C2601/02; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR THE PREPARATION OF CYCLOPROPANES WHICH COMPRISES REACTING AT A TEMPERATURE OF FROM ABOUT -10*C. TO ABOUT 35*C., IN THE PRESENCE OF AN INERT SOLVENT, ALLYL HALIDES WITH DIBORANCE, SUBJECTING THE RESULTING REACTION MIXTURE TO FURTHER REACTION WITH AN ALKALI SELECTED FROM THE GROUP CONSISTING OF AQUEOUS SOLUTIONS OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE, AND SEPARATING THE CYCLOPROPANES FROM THE FINAL REACTION MIXTURE.
Claim 2
Dependent Claim
65 words
A PROCESS FOR THE PREPARATION OF CYCLOPROPANES WHICH COMPRISES REACTING AT A TEMPERATURE OF FROM ABOUT -10*C. TO ABOUT 35*C., IN THE PRESENCE OF AN INERT SOLVENT, ALLYL HALIDES WITH DIBORANCE, SUBJECTING THE RESULTING REACTION MIXTURE TO FURTHER REACTION WITH AN ALKALI SELECTED FROM THE GROUP CONSISTING OF AQUEOUS SOLUTIONS OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE, AND SEPARATING THE CYCLOPROPANES FROM THE FINAL REACTION MIXTURE.
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) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |