US3557530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of acetylene from gases obtained by pyrolysis
Assignee: Hoechst AG
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Filing: 1970-01-21
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Granted: 1971-01-26
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Expires: 1990-01-21
Abstract
Abstract Process for the separation of acetylene from gases obtained by pyrolysis by absorption by means of a high boiling solvent which absorbs acetylene selectively and by subsequent desorption, in which the portions of the gas components absorbed by the solvent are again expelled in several stages, partly with the use of stripping gases.
Inventors
- 👤 Hartmut Voigt
- 👤 Egon Malow
- 👤 Walter Wetzel
- 👤 Erich Schneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:11
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |