US3595843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanadium coordination catalysts
Assignee: Dart Industries Inc
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Filing: 1969-07-31
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Granted: 1971-07-27
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Expires: 1989-07-31
Abstract
Abstract THE REACTION PRODUCT OF A VANADIUM OXIDE SUCH AS VANADIUM PENTOXIDE AND AN ORGANOPHOSPHATE SUCH AS TRIETHYL PHOSPHATE IN THE PRESENCE OF OXYGEN OR AN OXYGENCONTAINING GAS SUCH AS AIR WHEN COMBINED WITH AN ORGANOALUMINUM HALIDE RESULTS IN A VERY ACTIVE VANADIUM COORDINATION CATALYST. THIS CATALYST IS ESPECIALLY USEFUL IN THE PRODUCTION OF "EP" AND "EPDM" RUBBER.
Inventors
- 👤 James R Huerta
- 👤 Amos R Anderson
- 👤 Jeffrey G Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
C; C08; C08F; C08F10/00
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |