US2802728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superphosphate and its manufacture
Assignee: Phillips Petroleum Co
•
Filing: 1953-10-12
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Granted: 1957-08-13
•
Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Lloyd L Jaquier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
C; C05; C05B; C05B1/00; C05B1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN THE PROCESS FOR PRODUCTION OF SUPERPHOSPHATE FROM PHOSPHATE ROCK WHICH COMPRISES ACIDULATION OF A COMMINUTED PHOSPHATE ROCK WITH SULFURIC ACID BY MIXING SAID ROCK WITH SULFURIC ACID AND BY DENNING AND CURING THE REACTION MASS WHICH RESULTS FROM SAID MIXING, THE STEP OF PROVIDING A WETTING AGENT IN THE SULFURIC ACID DURING SAID ACIDULATION OF SAID ROCK THEREWITH, SAID WETTING AGENT BEING SUBSTANTIALLY STABLE INTHE PRESENCE OF SAID SULFURIC ACID AND BEING A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF: A HYDROCARBON SULFONIC ACID, A HYDROCARBON SULFURIC ACID, PETROLEUM GREEN ACIDS, AN ALKYL AMIDE SULFURIC ACID, AN ALKALINE EARTH AND AN ALKALI METAL SALT OF AT LEAST ONE OF THE FOREGOING SAID ACIDS; EACH OF SAID ACIDS AND SALTS THEREOF CONTAINING FROM 6 TO 20 CARBON ATOMS; A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
134 words
IN THE PROCESS FOR PRODUCTION OF SUPERPHOSPHATE FROM PHOSPHATE ROCK WHICH COMPRISES ACIDULATION OF A COMMINUTED PHOSPHATE ROCK WITH SULFURIC ACID BY MIXING SAID ROCK WITH SULFURIC ACID AND BY DENNING AND CURING THE REACTION MASS WHICH RESULTS FROM SAID MIXING, THE STEP OF PROVIDING A WETTING AGENT IN THE SULFURIC ACID DURING SAID ACIDULATION OF SAID ROCK THEREWITH, SAID WETTING AGENT BEING SUBSTANTIALLY STABLE INTHE PRESENCE OF SAID SULFURIC ACID AND BEING A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF: A HYDROCARBON SULFONIC ACID, A HYDROCARBON SULFURIC ACID, PETROLEUM GREEN ACIDS, AN ALKYL AMIDE SULFURIC ACID, AN ALKALINE EARTH AND AN ALKALI METAL SALT OF AT LEAST ONE OF THE FOREGOING SAID ACIDS; EACH OF SAID ACIDS AND SALTS THEREOF CONTAINING FROM 6 TO 20 CARBON ATOMS; A COMPOUND OF THE FORMULA
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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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |