US3401012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing multivalent metal pyrophosphates
Assignee: Monsanto Co
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Filing: 1966-12-27
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Granted: 1968-09-10
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 George D Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:55
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PRODUCING METAL PYROPHOSPHATES COMPRISING REACTING PYROPHOSPHORIC ACID AND A METAL SOURCE SELECTED FROM THE GROUP CONSISTING OF IRON, ZINC, LEAD, COPPER, COBALT, ALUMINUM, NICKEL AND TIN IN AN AQUEOUS MEDIUM CONTAINING AT LEAST ABOUT 84 WEIGHT PERCENT OF WATER, AT A TEMPERATURE BELOW ABOUT 50*C. AND AT A PH FROM ABOUT 1.5 TO ABOUT 7 TO THEREBY FORM A METAL PYROPHOSPHATE PRECIPITATE SELECTED FROM THE GROUP CONSISTING OF IRON, ZINC, LEAD, COPPER, COBALT, ALUMINUM, NICKEL AND TIN AND RECOVERING SAID METAL PYROPHOSPHATE.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PRODUCING METAL PYROPHOSPHATES COMPRISING REACTING PYROPHOSPHORIC ACID AND A METAL SOURCE SELECTED FROM THE GROUP CONSISTING OF IRON, ZINC, LEAD, COPPER, COBALT, ALUMINUM, NICKEL AND TIN IN AN AQUEOUS MEDIUM CONTAINING AT LEAST ABOUT 84 WEIGHT PERCENT OF WATER, AT A TEMPERATURE BELOW ABOUT 50*C. AND AT A PH FROM ABOUT 1.5 TO ABOUT 7 TO THEREBY FORM A METAL PYROPHOSPHATE PRECIPITATE SELECTED FROM THE GROUP CONSISTING OF IRON, ZINC, LEAD, COPPER, COBALT, ALUMINUM, NICKEL AND TIN AND RECOVERING SAID METAL PYROPHOSPHATE.
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |