US2684286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of phosphorous acid
Assignee: Individual
•
Filing: 1951-11-26
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Granted: 1954-07-20
•
Expires: 1971-11-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Krieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
CONTINUOUS LIQUID SINGLE PHASE PROCESS FOR THE PREPARATION OF PHOSPHORUS ACID BY THE REACTION OF LIQUID PHOSPHORUS TRICHLORIDE WITH LIQUID WATER IN WHICH THE LIQUID REACTANTS ARE CONTINUOUSLY FED CONCURRENTLY IN A RATIO OF WATER TO PHOSPHORUS TRICHLORIDE SUCH THAT THE WATER IS 20%-40% IN EXCESS OF THE STOICHIOMETRIC QUANTITY CORRESPONDING TO THE REACTION
Claim 2
Dependent Claim
54 words
CONTINUOUS LIQUID SINGLE PHASE PROCESS FOR THE PREPARATION OF PHOSPHORUS ACID BY THE REACTION OF LIQUID PHOSPHORUS TRICHLORIDE WITH LIQUID WATER IN WHICH THE LIQUID REACTANTS ARE CONTINUOUSLY FED CONCURRENTLY IN A RATIO OF WATER TO PHOSPHORUS TRICHLORIDE SUCH THAT THE WATER IS 20%-40% IN EXCESS OF THE STOICHIOMETRIC QUANTITY CORRESPONDING TO THE REACTION
References Cited (Backward Citations)
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Cited
US1826302A
Cited
US1908239A
Cited
US2247373A
Cited
US2264759A
Cited
US2528767A
Cited
US2595198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |