Patent JPS604738A successfully refreshed from Google Patents.
US2914587A
Expired / Lapsed
US
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Removal of tarry materials in the process for making vinylacetylene from acetylene
Assignee: EIDP Inc
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Filing: 1957-06-28
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Granted: 1959-11-24
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Expires: 1977-06-28
Abstract
No abstract record available.
Inventors
- 👤 Crancer Ray Anderson
- 👤 Goertz John Richard
- 👤 Graham James Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:33
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C07C2527/00; C07C2527/06; C07C2527/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR THE MANUFACTURE OF MONOVINYLACETYLENE FROM ACETYLENE BY PASSING ACETYLENE IN THE FORM OF BUBBLES THROUGH AN AQUEOUS CUPROUS CHLORIDE CATALYS SOLUTION, THE IMPROVEMENT WHICH COMPRISES MAINTAINING AS A SEPARATE PHASE, DISPERSED IN THE CATALYST SOLUTION, FROM 1.5% TO 20.0%, BASED ON THE WEIGHT OF THE CATLYST SOLUTION, OF A MONOALKYL ETHER OF DIETHYLENE GLYCOL CONTAINING FROM 1 TO 8 CARBON ATOMS IN THE ALKYL RADICAL, DRAWING OFF THE CATALYST SOLUTION CONTAINING THE DISPERSED DIETHYLENE GLYCOL MONOALKY ETHER, ALLOWING IT TO SEPARATE IN LAYERS, SEPARATING THE LAYERS, AND RETURNING THE CATALYST SOLUTION TO THE PROCESS.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR THE MANUFACTURE OF MONOVINYLACETYLENE FROM ACETYLENE BY PASSING ACETYLENE IN THE FORM OF BUBBLES THROUGH AN AQUEOUS CUPROUS CHLORIDE CATALYS SOLUTION, THE IMPROVEMENT WHICH COMPRISES MAINTAINING AS A SEPARATE PHASE, DISPERSED IN THE CATALYST SOLUTION, FROM 1.5% TO 20.0%, BASED ON THE WEIGHT OF THE CATLYST SOLUTION, OF A MONOALKYL ETHER OF DIETHYLENE GLYCOL CONTAINING FROM 1 TO 8 CARBON ATOMS IN THE ALKYL RADICAL, DRAWING OFF THE CATALYST SOLUTION CONTAINING THE DISPERSED DIETHYLENE GLYCOL MONOALKY ETHER, ALLOWING IT TO SEPARATE IN LAYERS, SEPARATING THE LAYERS, AND RETURNING THE CATALYST SOLUTION TO THE PROCESS.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |