US2974010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of nitrogen-phosphoric acid compounds
Assignee: Henkel AG and Co KGaA
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Filing: 1957-07-19
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Granted: 1961-03-07
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Expires: 1977-07-19
Abstract
No abstract record available.
Inventors
- 👤 Koster Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C01; C01B; C01B21/00; C01B21/082; C01B21/087; C01B21/092; C01B21/0923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
PROCESS FOR THE PRODUCTION OF NITROGEN-PHOSPHORIC ACID COMPOUNDS WHICH CONSISTS ESSENTIALLY OF REACTING ANHYDROUS AMMONIA WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE ANHYDROUS PHOSPHATE SALT OF AMMONIA AND ALKALI METALS, AND MIXTURES THEREOF, SAID PHOSPHATE SALT BEING SELECTED FROM THE GROUP CONSISTING OF PYROPHOSPHATE, METAPHOSPHATE, TRIMETAPHOSPHATE, HEXAMETAPHOSPHATE, TRIPOLYPHOSPHATE AND TETRAPOLYPHOSPHATE AT A PRES SURE OF BETWEEN ABOUT 30 TO 120 ATMOSPHERES'' GAUGE AND AT A TEMPERATURE OF BETWEEN ABOUT 50 TO 130 DEGREES C. AND RECOVERING THE NITROGEN-PHOSPHORIC ACID COMPOUND FORMED.
Claim 2
Dependent Claim
84 words
PROCESS FOR THE PRODUCTION OF NITROGEN-PHOSPHORIC ACID COMPOUNDS WHICH CONSISTS ESSENTIALLY OF REACTING ANHYDROUS AMMONIA WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE ANHYDROUS PHOSPHATE SALT OF AMMONIA AND ALKALI METALS, AND MIXTURES THEREOF, SAID PHOSPHATE SALT BEING SELECTED FROM THE GROUP CONSISTING OF PYROPHOSPHATE, METAPHOSPHATE, TRIMETAPHOSPHATE, HEXAMETAPHOSPHATE, TRIPOLYPHOSPHATE AND TETRAPOLYPHOSPHATE AT A PRES SURE OF BETWEEN ABOUT 30 TO 120 ATMOSPHERES'' GAUGE AND AT A TEMPERATURE OF BETWEEN ABOUT 50 TO 130 DEGREES C. AND RECOVERING THE NITROGEN-PHOSPHORIC ACID COMPOUND FORMED.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |