US2737443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of stabilized sodium acid pyrophosphate
Assignee: Monsanto Chemicals Ltd
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Filing: 1952-06-17
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Granted: 1956-03-06
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Expires: 1972-06-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Felix H Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:50
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/42; C01B25/425
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
STABILIZED SODIUM ACID PYROPHOSPHATE OF SUBSTANTIALLY IMPOVED DOUGHNUT BAKING PROPERTIES AND LOW TURBIDITY PRODUCED BY THERMALLY EVAPORATING A MONOSODIUM ORTHOPHOSPHATE SOLUTION CONTAINING FROM 1.0% TO 12.5% BY WEIGHT REFERRED TO NAH2PO4 OF PREVIOUSLY-FORMED SODIUM ACID PYROPHOSPHATE, TOGETHER WITH ABOUT 0.10% TO ABOUT 0.20% K2O AND ABOUT 0.025% TO ABOUT 0.075% AL203, BASIS NAH2PO4, TO PRODUCE SUBSTANTIALLY DRY MONOSODIUM ORTHOPHOSPHATE, CALCINING THE SAID MONOSODIUM ORTHOPHOSPHATE AT A TEMPERATURE OF ABOUT 225* C. TO ABOUT 235* C. UNITL SODIUM ACID PYROPHOSPHATE HAS BEEN FORMED AND THEREAFTER TEMPERING SAID PYROPHOSPHATE BY MAINTAINING IT AT ATMOSPHERIC PRESSURE AND AT A TEMPERATURE OF ABOUT 215* C. TO 245* C. IN AN ATMOPSOHERE CONTAINING 230 MM. TO 760 MM. HG PARTIAL PRESSURE OF STEAM, SAID TEMPERING BEING CARRIED OUT FOR ABOUT ONE HOUR TO ABOUT 4 HOURS.
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |