Patent US2995421A successfully refreshed from Google Patents.
US2995421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous sodium aluminum phosphate
Assignee: Stauffer Chemical Co
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Filing: 1959-12-17
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Granted: 1961-08-08
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Expires: 1979-12-17
Abstract
No abstract record available.
Inventors
- 👤 James N Dyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:10
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AMORPHOUS SODIUM ALUMINUM PHOSPHATE HAVING AN EMPIRICAL FORMULA ESSENTIALLY REPRESENTED BY
Claim 2
Dependent Claim
11 words
AMORPHOUS SODIUM ALUMINUM PHOSPHATE HAVING AN EMPIRICAL FORMULA ESSENTIALLY REPRESENTED BY
References Cited (Backward Citations)
US2550490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |