US2776187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of tripolyphosphates
Assignee: Chemische Fabrik Budenhiem KG
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Filing: 1951-09-04
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Granted: 1957-01-01
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Expires: 1971-09-04
Abstract
No abstract record available.
Inventors
- 👤 Pfrengle Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:37
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
86 words
THE PROCESS OF OF PRODUCING SODIUM TRIPOLYPHOSPHATE (NA5P3O10) WHICH COMPRISES HEATING A MIXTURE OF DISODIUM PHOSPHATE AND MONOSODIUM PHOSPHATE HAVING A MOLAR RATIO OF APPROXINATELY 5 MOLS OF SODIUM OXIDE TO 3 MOLS OF PHOSPHORUS PENTOXIDE TO A TEMPERATURE BETWEEN ABOUT 250* AND 540*C., FOR A PERIOD OF FROM ABOUT 10 TO 90 MINUTES IN THE PRESENCE OF FROM 0.5 TO ABOUT 7 PERCENT OF A CATALYTIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE NITRATES OF UREA, GUANIDINE, DICYANDIAMIDE, SEMICARBAZIDE AND HECAMETHYLENETETRAMINE AND AMMONIUM NITRATE.
Claim 2
Dependent Claim
86 words
THE PROCESS OF OF PRODUCING SODIUM TRIPOLYPHOSPHATE (NA5P3O10) WHICH COMPRISES HEATING A MIXTURE OF DISODIUM PHOSPHATE AND MONOSODIUM PHOSPHATE HAVING A MOLAR RATIO OF APPROXINATELY 5 MOLS OF SODIUM OXIDE TO 3 MOLS OF PHOSPHORUS PENTOXIDE TO A TEMPERATURE BETWEEN ABOUT 250* AND 540*C., FOR A PERIOD OF FROM ABOUT 10 TO 90 MINUTES IN THE PRESENCE OF FROM 0.5 TO ABOUT 7 PERCENT OF A CATALYTIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE NITRATES OF UREA, GUANIDINE, DICYANDIAMIDE, SEMICARBAZIDE AND HECAMETHYLENETETRAMINE AND AMMONIUM NITRATE.
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) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |