US2971995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of olefins
Assignee: Monsanto Chemicals Ltd
•
Filing: 1959-06-22
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Granted: 1961-02-14
•
Expires: 1979-06-22
Abstract
No abstract record available.
Inventors
- 👤 Robert P Arganbright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/54; C07C5/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR THE PRODUCTION OF PROPYLENE WHICH COMPRISES REACTING PROPANE WITH HYDROGEN CHLORIDE AND OXYGEN IN THE PRESENCE OF A CATALYST WHICH CONSISTS ESSENTIALLY OF MAGNESIUM CHLORIDE SUPPORTED UPON PUMICE AT A TEMPERATURE ABOVE ABOUT 450*C.
Claim 2
Dependent Claim
37 words
A PROCESS FOR THE PRODUCTION OF PROPYLENE WHICH COMPRISES REACTING PROPANE WITH HYDROGEN CHLORIDE AND OXYGEN IN THE PRESENCE OF A CATALYST WHICH CONSISTS ESSENTIALLY OF MAGNESIUM CHLORIDE SUPPORTED UPON PUMICE AT A TEMPERATURE ABOVE ABOUT 450*C.
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) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |