US2542976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of alkynes
Assignee: Shell Development Co
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Filing: 1947-09-29
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Granted: 1951-02-27
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Expires: 1967-09-29
Abstract
No abstract record available.
Inventors
- 👤 Airs Raymond Spencer
- 👤 Garner Philip James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:48
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/26; C07C1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
THE METHOD OF FORMING AN ALKYNE FROM A HALOGENATED HYDROCARBON SAID METHOD COMPRISING FORMING AN ANHYDROUS ALCOHOLATE OF AN ALKALI METAL AND A HYDROXYLIC LIQUID HAVING A BOILING POINT IN EXCESS OF 100* C., DISSOLVING SAID ALCOHOLATE IN AN EXCESS OF SAID LIQUID, DISSOLVING IN THE RESULTING SOLUTION A HALOGENATED HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALKANES HAVING TWO HALOGEN ATOMS ATTACHED TO A SINGLE CARBON ATOM, ALKANES HAVING A HALOGEN ATOM ATTACHED TO EACH OF TWO ADJACENT CARBON ATOMS, AND ALKENES HAVING A HALOGEN ATOM ATTACHED TO AN UNSATURATED CARBON ATOM, THE CONTENT OF ALKALI METAL IN SAID SOLUTION BEING AT LEAST EQUIVALENT TO THE CONTENT OF HALOGEN ATTACHED TO SAID HYDROCARBON, THE SOLUTION SO FORMED BEING ANHYDROUS IN NATURE, AND HEATING SAID ANHYDROUS SOLUTION AT A TEMPERATURE ABOVE 75* C. TO EFFECT DEHYDROHALOGENATION OF SAID HALOGENATED HYDROCARBONS TO FORM THE ALKYNE.
Claim 2
Independent Claim
39 words
THE METHOD OF FORMING ALKYNES COMPRISING FORMING AN ANHYDROUS SOLUTION OF A MONOHALOALKENE HAVING A HALOGEN ATOM ATTACHED TO AN UNSATURATED CARBON ATOM THEREOF IN AN ANHYDROUS SOLUTION OF AN ALKALI METAL CLCOHOLATE AND HEATING THE RESULTING MONOHAL-ALKENE-CONTAINING SOLUTION.
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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |