US2856279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen-phosphorus compounds
Assignee: Tennessee Valley Authority
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Filing: 1955-12-19
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Granted: 1958-10-14
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Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Travis P Hignett
- 👤 John M Stinson
- 👤 Needham A Brown
- 👤 Maurice C Nason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:46
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/405; C01B21/00; C01B21/082; C01B21/087; C01B21/092; C01B21/0923; C01B25/28; C05; C05B; C05B13/00; C05B13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE PRODUCTION OF A FERTILIZER MATERIAL OF HIGH BULK DENSITY AND LOW HYGROSCOPICITY WHICH COMPRISES INTODUCING AN INTIMATE MIXTURE OF AMMONIUM METAPHOSPHATE, PHOSPHORONITRIDIC ACID, AND AMONIUM PHOSPHORONITRIDATE, SAID MIXTURE HAVING AN ATOMIC RATIO OF NITROGEN TO PHOSPHORUS IN THE RANGE FROM 1.05 TO 1.35 AND HAVING FROM 60 TO 75 PERCENT OF ITS NITROGEN IN AMMONIACAL FORM, INTO A HYDROLYSIS ZONE; THEREIN HYDROLYZING THE MIXTURE WITH WATER TO SUCH EXTENT THAT FROM ABOUT 80 PERCENT TO 95 PERCENT OF ITS NITROGEN CONTENT IS PRESENT IN AMMONIACAL FORM; MAINTAINING THE MATERIAL WITH THE TEMPERATURE RANGE FROM ABOUT 200*F. TO THE DECOMPOSITION POINT OF THE MATERIAL HYDROLYSIS; AND COOLING, CRUSHING, AND SIZING THE PRODUCT.
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE PRODUCTION OF A FERTILIZER MATERIAL OF HIGH BULK DENSITY AND LOW HYGROSCOPICITY WHICH COMPRISES INTODUCING AN INTIMATE MIXTURE OF AMMONIUM METAPHOSPHATE, PHOSPHORONITRIDIC ACID, AND AMONIUM PHOSPHORONITRIDATE, SAID MIXTURE HAVING AN ATOMIC RATIO OF NITROGEN TO PHOSPHORUS IN THE RANGE FROM 1.05 TO 1.35 AND HAVING FROM 60 TO 75 PERCENT OF ITS NITROGEN IN AMMONIACAL FORM, INTO A HYDROLYSIS ZONE; THEREIN HYDROLYZING THE MIXTURE WITH WATER TO SUCH EXTENT THAT FROM ABOUT 80 PERCENT TO 95 PERCENT OF ITS NITROGEN CONTENT IS PRESENT IN AMMONIACAL FORM; MAINTAINING THE MATERIAL WITH THE TEMPERATURE RANGE FROM ABOUT 200*F. TO THE DECOMPOSITION POINT OF THE MATERIAL HYDROLYSIS; AND COOLING, CRUSHING, AND SIZING THE PRODUCT.
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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |