US3557199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of acrolein and methacrolein
Assignee: WR Grace and Co
•
Filing: 1967-02-21
•
Granted: 1971-01-19
•
Expires: 1987-02-21
Abstract
Abstract A CATALYST COMPOSITION COMPRISING OXIDES OF NIOBIUM AND MOLYBDENUM WHICH FIND PARTICULAR USEFULNESS IN THE CATALYTIC VAPOR PHASE OXIDATION OF ACROLEIN AND/OR METHACROLEIN TO ACRYLIC ACID AND/OR METHACRYLIC ACID. IN THE PREFERRED CATALYST FORM THE OXIDES OF NIOBIUM AND MOLYBDENUM ARE DISPERSED WITHIN A SUITABLE SUPPORT MATERIAL, PREFERABLY SILICA GEL.
Inventors
- 👤 R Partthasarathy
- 👤 Frank G Ciapetta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:31
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/24; B01J23/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |