US3645910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous sol and gel of zirconium compounds
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1969-11-14
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Granted: 1972-02-29
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Expires: 1989-11-14
Abstract
Abstract THE INVENTION DISCLOSES A NOVEL ZIRCONIUM COMPOUND WHEREIN THE RATIO OF NITRATE TO ZIRCONIA IS ABOUT 1.1. THIS COMPOUND IS MADE BY REACTING ZIRCONIUM HYDROXIDE OR CARBONATE WITH NITRIC ACID TO PROVIDE A WATER-BASED SOL. THE SOL MAY BE CONVERTED INTO THE GEL BY DRYING AT ABOUT 80-90*C. OVER A PERIOD OF A FEW DAYS TO GIVE A SOLID GLASSY MASS WHICH CAN EASILY BE RE-DISSOLVED IN WATER TO GIVE THE SOL. THE GEL HAS THE EMPIRICAL FORMULA: (ZR4(OH)12(NO3)2(H2O)4)(NO3)2.2H2O AND CONTAINS LATTICE WATER, COVALENT NITRO GROUPS AND IONIC NITRATE GROUPS.
Inventors
- 👤 James Louis Woodhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:22
CPC Classifications
C; C01; C01G; C01G25/00
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |