US3259585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing stabilized zirconia sols
Assignee: WR Grace and Co
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Filing: 1963-08-14
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Granted: 1966-07-05
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Expires: 1983-08-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick T Fitch
- 👤 Jean G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:52
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C01; C01G; C01G25/00; C01G25/02; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C01P; C01P2002/00; C01P2002/02; C01P2002/50; C01P2002/52; C01P2002/54; C01P2002/60; C01P2002/70; C01P2002/77; C01P2004/00; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/40; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR PREPARING A ZIRCONIA SOL CONSISTING OF PARTICLES STABLIZED AGAINST THE MONOCLINIC-TETRAGONAL PHASE TRANSFORMATION WHEN PARTICLES ARE HEATED TO A TEMPERATURE ABOVE 350*C. WHICH COMPRISES ADDING A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF SCANDIUM, YTTRIUM AND ELEMENTS 62 TO 71 OF THE PERIODIC TABLE IN AN AMOUNT SUFFICIENT TO PROVIDE 1 TO 5 MOLE PERCENT OF SAID METAL OXIDE IN SAID SOL, IN AN AQUEOUS MEDIUM, TO A ZIRCONIUM SALT SOLUTION FOLLOWED BY HEATING TO 60 TO 120*C. FOR 1/2 OF 4 HOURS TO COMPLETE THE STABILIZED SOL PREPARATION.
Claim 2
Dependent Claim
95 words
A PROCESS FOR PREPARING A ZIRCONIA SOL CONSISTING OF PARTICLES STABLIZED AGAINST THE MONOCLINIC-TETRAGONAL PHASE TRANSFORMATION WHEN PARTICLES ARE HEATED TO A TEMPERATURE ABOVE 350*C. WHICH COMPRISES ADDING A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF SCANDIUM, YTTRIUM AND ELEMENTS 62 TO 71 OF THE PERIODIC TABLE IN AN AMOUNT SUFFICIENT TO PROVIDE 1 TO 5 MOLE PERCENT OF SAID METAL OXIDE IN SAID SOL, IN AN AQUEOUS MEDIUM, TO A ZIRCONIUM SALT SOLUTION FOLLOWED BY HEATING TO 60 TO 120*C. FOR 1/2 OF 4 HOURS TO COMPLETE THE STABILIZED SOL PREPARATION.
References Cited (Backward Citations)
US1470195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |