US2605295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of acetylenic compounds
Assignee: Shell Development Co
•
Filing: 1948-10-04
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Granted: 1952-07-29
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Expires: 1968-10-04
Abstract
No abstract record available.
Inventors
- 👤 Garner Philip James
- 👤 Firth Denis Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:15
CPC Classifications
C; C07; C07F; C07F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE PROCESS COMPRISING REACTING AN ALKALI METAL WITH HEPTYNE-1 IN THE PRESENCE OF FROM 10% TO 50% BY WEIGHT OF HEPTYNE-2, BASED ON THE TOTAL WEIGHT OF HEPTYNES PRESENT, AND IN A COMMERCIAL XYLENE SOLVENT IN WHICH THE RESULTING ALKALI METAL ACETYLIDE IS SOLUBLE, SAID SOLVENT HAVING A TOTAL SULFUR CONTENT OF FROM 0.05% TO 0.5% BY WEIGHT.
Claim 2
Dependent Claim
58 words
THE PROCESS COMPRISING REACTING AN ALKALI METAL WITH HEPTYNE-1 IN THE PRESENCE OF FROM 10% TO 50% BY WEIGHT OF HEPTYNE-2, BASED ON THE TOTAL WEIGHT OF HEPTYNES PRESENT, AND IN A COMMERCIAL XYLENE SOLVENT IN WHICH THE RESULTING ALKALI METAL ACETYLIDE IS SOLUBLE, SAID SOLVENT HAVING A TOTAL SULFUR CONTENT OF FROM 0.05% TO 0.5% BY WEIGHT.
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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |