US3657295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of tri-n-butyl vanadate
Assignee: Texaco Inc
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Filing: 1970-11-23
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Granted: 1972-04-18
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Expires: 1990-11-23
Abstract
Abstract TRI-N-BUTYL VANADATE IS PRODUCED IN SIGNIFICANTLY HIGH YIELDS WHEN VANADIUM PENTOXIDE (V2O5) IS REACTED WITH N-BUTANOL IN THE PRESENCE OF TOLUENE. A STOICHIOMETRIC EXCESS OF N-BUTANOL FURTHER ENHANCES THE IMPROVED YIELDS. YIELDS ARE FURTHER IMPROVED IN A PREFEREED EMBODIMENT WHEN CONDENSED VAPORS OF BUTANOL AND TOLUENE PASS THROUGH A QUANTITY OF VANADIUM PENTOXIDE AND ARE RETURNED TO A REFLUXING QUANTITY OF BUTANOL AND TOLUENE.
Inventors
- 👤 David R Mccoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:29
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/005
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |