US2557730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of mixed phosphatic fertilizers
Assignee: Spolek Pro Chemickou A Hutni Vyrobu Narodni Podnik Unite
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Filing: 1948-07-29
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Granted: 1951-06-19
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Ettel Viktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:35
CPC Classifications
C; C05; C05B; C05B17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR PRODUCING PHOSPHATIC FERTILIZERS FROM NATURAL PHOSPHATIC MINERALS, WHICH INCLUDES THE STEPS OF REACTING THE COMMINUTED PHOSPHATIC MINERALS IN THE PRESENCE OF WATER WITH TECHNICAL AMMONIUM IMIDOSULPHONATE CONTAMINATED WITH AMMONIUM AMIDOSULPHONATE AND AMMONIUM NITRILOSULPHONATE UNDER MECHANICAL AGITATION, KNEADING THE MIXTURE, PERMITTING THE MIXTURE TO CONGEAL, AND BREAKING UP THE CONGEALED MASS INTO PROPER CONDITION FOR USE.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PRODUCING PHOSPHATIC FERTILIZERS FROM NATURAL PHOSPHATIC MINERALS, WHICH INCLUDES THE STEPS OF REACTING THE COMMINUTED PHOSPHATIC MINERALS IN THE PRESENCE OF WATER WITH TECHNICAL AMMONIUM IMIDOSULPHONATE CONTAMINATED WITH AMMONIUM AMIDOSULPHONATE AND AMMONIUM NITRILOSULPHONATE UNDER MECHANICAL AGITATION, KNEADING THE MIXTURE, PERMITTING THE MIXTURE TO CONGEAL, AND BREAKING UP THE CONGEALED MASS INTO PROPER CONDITION FOR USE.
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) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |