US3773850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dehydrogenation of propane
Assignee: Dow Chemical Co
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Filing: 1971-06-28
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Granted: 1973-11-20
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Expires: 1991-06-28
Abstract
Abstract A PROCESS FOR DEHYDROGENATING PROPANE TO PROVIDE HIGHER SELECTIVITY TO PROPYLENE BY INCORPORATING INTO THE PROPANE STREAM DURING DEHYDROGENATION FROM ABOUT 2 TO ABOUT 40 WEIGHT PERCENT OF H2S OR A COMPOUND WHICH PRODUCES H2S IN SITU.
Inventors
- 👤 L Tischler
- 👤 M Wing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:55
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |