Patent US2765216A successfully refreshed from Google Patents.
US2765216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of monoperphosphoric acid
Assignee: EIDP Inc
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Filing: 1953-10-09
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Granted: 1956-10-02
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Expires: 1973-10-09
Abstract
No abstract record available.
Inventors
- 👤 Edward W Heiderich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:35
CPC Classifications
C; C01; C01B; C01B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A METHOD FOR PRODUCING MONOPERPHOSPHORIC ACID BY REACTING AQUEOUS HYDROGEN PEROXIDE WITH PHOSPHORUS PENTOXIDE, THE IMPROVEMENT COMPRISING HEATING A HIGHLY REACTIVE PHOSPHORUS PENTOXIDE TO A TEMPERATURE SUFFICIENTLY ELEVATED AND FOR A TIME SUFFICIENTLY LONG TO DECREASE SUBSTANTIALLY ITS REACTIVITY TOWARDS AQUEOUS HYDROGEN PEROXIDE, AND REACTING THE SO HEATED PHOSPHORUS PENTOXIDE WITH AQUEOUS HYDROGEN PEROXIDE TO PRODUCE SAID MONOPERPHOSPHORIC ACID.
Claim 2
Dependent Claim
60 words
IN A METHOD FOR PRODUCING MONOPERPHOSPHORIC ACID BY REACTING AQUEOUS HYDROGEN PEROXIDE WITH PHOSPHORUS PENTOXIDE, THE IMPROVEMENT COMPRISING HEATING A HIGHLY REACTIVE PHOSPHORUS PENTOXIDE TO A TEMPERATURE SUFFICIENTLY ELEVATED AND FOR A TIME SUFFICIENTLY LONG TO DECREASE SUBSTANTIALLY ITS REACTIVITY TOWARDS AQUEOUS HYDROGEN PEROXIDE, AND REACTING THE SO HEATED PHOSPHORUS PENTOXIDE WITH AQUEOUS HYDROGEN PEROXIDE TO PRODUCE SAID MONOPERPHOSPHORIC ACID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |