Patent US2684947A successfully refreshed from Google Patents.
US2684947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noncaking silicofujoride-
Assignee: —
•
Filing: —
•
Granted: 1954-07-27
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Expires: 1971-07-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:31
CPC Classifications
—
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A MIXTURE CONSISTING ESSENTIALLY OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIUM, MAGNESIUM AND ZINC SILICOFLUORIDES AND MIXTURES THEREOF AND CONTAINING IN INTIMATE ADMIXTURE THEREWITH APPROXIMATELY 0.3-1.0%, BY WEIGHT, OF A LIGHT GRADE MAGNESIUM OXIDE HAVING A DENSITY OF LESS THAN ABOUT 10 POUNDS PER CUBIC FOOT.
References Cited (Backward Citations)
US2426836A
Cited
US2460680A
Cited
US2589330A
Cited
US676548A
Cited
US1617708A
Cited
US2218031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |