US3843554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst compositions of scheelite crystal structure containing vanadium,bismuth and cation vacancies
Assignee: EIDP Inc
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Filing: 1971-10-04
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Granted: 1974-10-22
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Expires: 1991-10-04
Abstract
Abstract 1. A CATALYST WHICH HAS SCHEELITE-TYPE CRYSTAL STRUCTURE OF THE FORMULA A1-Z&Z BO4 WHEREIN A REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.9 TO ABOUT 1.6 *A, SOME OF WHICH ARE TRIVALENT BISMUTH, AND AT LEAST ONE OTHER IS SELECTED FROM THE GROUP CONSISTING OF LEAD, CALCIUM, STRONTIUM, BARIUM, ZIRCONIUM AND HAFNIUM; B REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.3 TO ABOUT 0.5* A COMPRISING VANADIUM OR VANADIUM AND MOLYBDENUM; $ REPRESENTS A CATION VACANCY IN THE CRYSTAL STRUCTURE; AND Z IS A POSITIVE NUMBER IN THE RANGE OF AOUT 0.001 TO ABOUT 0.15.
Inventors
- 👤 Kamran Aykan
- 👤 Donald B Rogers
- 👤 Arthur W Sleight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:51
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J23/24; B01J23/31; B01J23/32; B01J23/36; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y10; Y10S; Y10S502/00; Y10S502/50; Y10S502/502; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A CATALYST WHICH HAS SCHEELITE-TYPE CRYSTAL STRUCTURE OF THE FORMULA A1-Z&Z BO4 WHEREIN A REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.9 TO ABOUT 1.6 *A, SOME OF WHICH ARE TRIVALENT BISMUTH, AND AT LEAST ONE OTHER IS SELECTED FROM THE GROUP CONSISTING OF LEAD, CALCIUM, STRONTIUM, BARIUM, ZIRCONIUM AND HAFNIUM; B REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.3 TO ABOUT 0.5* A COMPRISING VANADIUM OR VANADIUM AND MOLYBDENUM; $ REPRESENTS A CATION VACANCY IN THE CRYSTAL STRUCTURE; AND Z IS A POSITIVE NUMBER IN THE RANGE OF AOUT 0.001 TO ABOUT 0.15.
Claim 2
Dependent Claim
100 words
A CATALYST WHICH HAS SCHEELITE-TYPE CRYSTAL STRUCTURE OF THE FORMULA A1-Z&Z BO4 WHEREIN A REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.9 TO ABOUT 1.6 *A, SOME OF WHICH ARE TRIVALENT BISMUTH, AND AT LEAST ONE OTHER IS SELECTED FROM THE GROUP CONSISTING OF LEAD, CALCIUM, STRONTIUM, BARIUM, ZIRCONIUM AND HAFNIUM; B REPRESENTS CATIONS HAVING IONIC RADII IN THE RANGE OF ABOUT 0.3 TO ABOUT 0.5* A COMPRISING VANADIUM OR VANADIUM AND MOLYBDENUM; $ REPRESENTS A CATION VACANCY IN THE CRYSTAL STRUCTURE; AND Z IS A POSITIVE NUMBER IN THE RANGE OF AOUT 0.001 TO ABOUT 0.15.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |