Patent US2657992A successfully refreshed from Google Patents.
US2657992A
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Manganous ferrous phosphate composition
Assignee: Victor Chemical Works
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Filing: 1950-04-13
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Granted: 1953-11-03
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Expires: 1970-04-13
Abstract
No abstract record available.
Inventors
- 👤 Willard H Woodstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:49
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
AS A NEW COMPOSITION OF MATTER THE REACTION PRODUCT OF FERROPHOSPHORUS AND MANGANESE DIOXIDE WHEREIN THE MOL RATIO OF MANGANESE TO IRON IS WITHIN THE RANGE OF 5 TO 8 AND 11 TO 4.
Claim 2
Dependent Claim
34 words
AS A NEW COMPOSITION OF MATTER THE REACTION PRODUCT OF FERROPHOSPHORUS AND MANGANESE DIOXIDE WHEREIN THE MOL RATIO OF MANGANESE TO IRON IS WITHIN THE RANGE OF 5 TO 8 AND 11 TO 4.
References Cited (Backward Citations)
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US1660661A
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US1866879A
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US2480103A
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US2489758A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |