US2762698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fertilizer manufacture and uranium recovery
Assignee: Monsanto Chemicals Ltd
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Filing: 1952-03-22
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Granted: 1956-09-11
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Expires: 1972-03-22
Abstract
No abstract record available.
Inventors
- 👤 Marion D Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:45
CPC Classifications
C; C05; C05B; C05B13/00; C05B13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
PROCESS OF PREPEARING SOLUBLE PHOSPHATIC MATERIALS, WHICH COMPRISES FUSING CALCIUM-PHOSPHORUS CONTAINING MATERIAL AND A PORTION OF SAID SOLUBLE PHOSPHATIC MATERIALS PRODUCED BY SAID PROCESS, REMOVING ORTHOPHOSPHATIC MATERIAL FROM THE RESULTING MELT, REACTING THE MELT WITH AQUEOUS AMMONIUM CARBONATE, FILTERING OUT THE CALCIUM CARBONATE PRODUCED, EVAPORATING THE FILTRATE TO SEPARATE OUT THE SOLUBLE PHOSPHATIC MATERIALS THUS PRODUCED AS PRODUCT AND RECYCLING A PORTION OF SAID PRODUCT TO THE FUSION STEP.
Claim 2
Dependent Claim
69 words
PROCESS OF PREPEARING SOLUBLE PHOSPHATIC MATERIALS, WHICH COMPRISES FUSING CALCIUM-PHOSPHORUS CONTAINING MATERIAL AND A PORTION OF SAID SOLUBLE PHOSPHATIC MATERIALS PRODUCED BY SAID PROCESS, REMOVING ORTHOPHOSPHATIC MATERIAL FROM THE RESULTING MELT, REACTING THE MELT WITH AQUEOUS AMMONIUM CARBONATE, FILTERING OUT THE CALCIUM CARBONATE PRODUCED, EVAPORATING THE FILTRATE TO SEPARATE OUT THE SOLUBLE PHOSPHATIC MATERIALS THUS PRODUCED AS PRODUCT AND RECYCLING A PORTION OF SAID PRODUCT TO THE FUSION STEP.
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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |