Patent US3418251A successfully refreshed from Google Patents.
US3418251A
Expired / Lapsed
US
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Gels of organic compounds of zirconium and process for forming same
Assignee: NL Industries Inc
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Filing: 1967-02-23
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Granted: 1968-12-24
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Expires: 1987-02-23
Abstract
No abstract record available.
Inventors
- 👤 Stynes James Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:34
CPC Classifications
C; C10; C10L; C10L7/00; C10L7/02; C07; C07F; C07F7/00; C07F7/003; C08; C08G; C08G79/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |