US2707676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of phosphonitrite fertilizers
Assignee: Compagnie de Saint Gobain SA
•
Filing: 1952-02-06
•
Granted: 1955-05-03
•
Expires: 1972-02-06
Abstract
No abstract record available.
Inventors
- 👤 Picot Lucien
- 👤 Martin Yves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:18
CPC Classifications
C; C05; C05B; C05B11/00; C05B11/04; C05B11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN THE METHOD OF MAKING FERTILIZER THAT COMPRISES REACTING RAW PHOSPHATIC MATERIAL OF FERTILIZER GRADE WITH ACID COMPRISING NITRIC ACID AND REACTING THE PRODUCT WITH AMMONIA, THE STEPS THAT COMPRISES BRINGING THE ACID INTO HEAT EXCHANGING RELATIONSHIP WITH LIQUID AMMONIA OUT OF CONTACT THEREWITH, THEREBY VAPORIZING THE AMMONIA AND COOLING SAID ACID, REACTING THE THUS COOLED ACID WITH THE PHOSPHATIC MATERIAL, AND PASSING THE THUS VAPORIZED AMMONIA INTO REACTIVE CONTACT WITH THE REACTON PRODUCT OF SUCH ACID AND PHOSPHATIC MATERIAL.
Claim 2
Dependent Claim
80 words
IN THE METHOD OF MAKING FERTILIZER THAT COMPRISES REACTING RAW PHOSPHATIC MATERIAL OF FERTILIZER GRADE WITH ACID COMPRISING NITRIC ACID AND REACTING THE PRODUCT WITH AMMONIA, THE STEPS THAT COMPRISES BRINGING THE ACID INTO HEAT EXCHANGING RELATIONSHIP WITH LIQUID AMMONIA OUT OF CONTACT THEREWITH, THEREBY VAPORIZING THE AMMONIA AND COOLING SAID ACID, REACTING THE THUS COOLED ACID WITH THE PHOSPHATIC MATERIAL, AND PASSING THE THUS VAPORIZED AMMONIA INTO REACTIVE CONTACT WITH THE REACTON PRODUCT OF SUCH ACID AND PHOSPHATIC MATERIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |