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US3594437A
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US
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Purification of diethynylbenzenes
Assignee: General Electric Co
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Filing: 1969-11-28
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Granted: 1971-07-20
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Expires: 1989-11-28
Abstract
Abstract IMPURE DIETHYNYLBENZENES ARE PURIFIED BY COOLING A SOLUTION OF THE MATERIAL IN A LIQUID ALKANE, MAINTAINING THE TEMPERATURE OF THE SOLUTION AT LEAST AS LOW AS -50*C., UNTIL THE PURIFIED DIETHYNYLBENZENE PRECIPITATES FROM THE SOLUTION AND ISOLATING THE PRECIPITATE FROM THE SOLUTION.
Inventors
- 👤 Dwain M White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:11
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |