Patent US3233967A successfully refreshed from Google Patents.
US3233967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of alkali metal tripolyphosphates
Assignee: Monsanto Co
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Filing: 1960-07-21
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Granted: 1966-02-08
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Expires: 1980-07-21
Abstract
No abstract record available.
Inventors
- 👤 Shen Chung Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:38
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD FOR REGULATING THE BULK DENSITY AND INPROVING THE FRIABILITY OF A PARTICULATED, AGGLOMERATED ALKALI METAL TRIPOLYPHOSPHATE WITHIN THE RANGE OF FROM ABOUT 0.4 TO ABOUT 1.1 GRAMS PER CUBIC CENTIMETER WHICH COMPRISES HEATING A COMPOSITION INITIALLY COMPRISING AN INTIMATE ADMIXTURE OF AN APPORPRIATE BLEND OF SOLID FINELY DIVIDED ALKALI METAL ORTHOPHOSPHATE SALTS AND A PREDETERMINED QUANTITY OF LIQUID WATER WITHIN THE RANGE OF FROM ABOUT 1% TO ABOUT 20% OF THE WEIGHT OF SAID ORTHOPHOSPHATE SALTS TO A TEMPERATURE BETWEEN ABOUT 250*C. AND ABOUT 550*C.; SAID QUANTITY OF LIQUID WATER VARYING IN APPROXIMATELY A DIRECT PROPORTION TO SAID PREDETERMINED DENSITY; MAINTAINING SAID TEMPERATURE UNTIL A SUBSTANTIAL CONVERSION OF SAID ORTHOPHOSPHATE SALTS TO ALKALI METAL TRIPOLYPHOSPHATE IS EFFECTED, AND THEN RECOVERING SAID PARTICULATED, AGGLOMERATED TRIPOLYPHOSPHATE; AT LEAST ABOUT 80 WEIGHT PERCENT OF THE PARTICLES OF SAID FINELY DIVIDED ALKALI METAL ORTHOPHOSPHATE SALTS BEING SMALL ENOUGH TO PASS THROUGH A U.S. STANDARD 60 MESH SCREEN.
Claim 2
Independent Claim
155 words
A METHOD FOR REGULATING THE BULK DENSITY AND INPROVING THE FRIABILITY OF A PARTICULATED, AGGLOMERATED ALKALI METAL TRIPOLYPHOSPHATE WITHIN THE RANGE OF FROM ABOUT 0.4 TO ABOUT 1.1 GRAMS PER CUBIC CENTIMETER WHICH COMPRISES HEATING A COMPOSITION INITIALLY COMPRISING AN INTIMATE ADMIXTURE OF AN APPORPRIATE BLEND OF SOLID FINELY DIVIDED ALKALI METAL ORTHOPHOSPHATE SALTS AND A PREDETERMINED QUANTITY OF LIQUID WATER WITHIN THE RANGE OF FROM ABOUT 1% TO ABOUT 20% OF THE WEIGHT OF SAID ORTHOPHOSPHATE SALTS TO A TEMPERATURE BETWEEN ABOUT 250*C. AND ABOUT 550*C.; SAID QUANTITY OF LIQUID WATER VARYING IN APPROXIMATELY A DIRECT PROPORTION TO SAID PREDETERMINED DENSITY; MAINTAINING SAID TEMPERATURE UNTIL A SUBSTANTIAL CONVERSION OF SAID ORTHOPHOSPHATE SALTS TO ALKALI METAL TRIPOLYPHOSPHATE IS EFFECTED, AND THEN RECOVERING SAID PARTICULATED, AGGLOMERATED TRIPOLYPHOSPHATE; AT LEAST ABOUT 80 WEIGHT PERCENT OF THE PARTICLES OF SAID FINELY DIVIDED ALKALI METAL ORTHOPHOSPHATE SALTS BEING SMALL ENOUGH TO PASS THROUGH A U.S. STANDARD 60 MESH SCREEN.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |