US2636808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized sodium acid pyrophosphate of improved doughnut baking properties and method of producing same
Assignee: Monsanto Chemicals Ltd
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Filing: 1950-05-15
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Granted: 1953-04-28
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Expires: 1970-05-15
Abstract
No abstract record available.
Inventors
- 👤 Findley E Hubbard
- 👤 Jr Felix H Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:50
CPC Classifications
A; A21; A21D; A21D2/00; A21D2/02; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/42; C01B25/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE METHOD OF PREPARING SODIUM ACID PYROPHOSPHATE HAVING SUBSTANTIALLY IMPROVED DOUGHNUT BAKING PROPERTIES FROM SODIUM ACID PYROPHOSPHATE PREPARED BY THERMALLY EVAPORATING A MONOSODIUM ORTHOPHOSPHATE SOLUTION WITHIN A PERIOD OF LESS THAN 12 SECONDS TO PREDUCE SUBSTANTIALLY DRY NAH2PO4, HEATING SAID NAH2PO4, IN AN ATMOSPHERE CONTAINING WATER VAPOR AT A PARTIAL PRESSURE OF ABOUT 100 MM. TO ABOUT 140 MM. OF MERCURY, TO A TEMPERATURE OF ABOUT 225* C. TO ABOUT 235*C. UNTIL SODIUM ACID PYROPHOSPHATE HAS BEEN FORMED AND THEREAFTER TEMPERING SAID PYROPHOSPHATE BY MAINTAINING IT AT A TEMPATURE AT ABOUT 225*C. TO ABOUT 235*C. FOR A PERIOD OF ABOUT 4 TO ABOUT 6 HOURS, SAID SODIUM ORTHOPHOSPHATE SOLUTION CONTAINING ABOUT 0.10% TO ABOUT 0.20% K20 AND ABOUT 0.025% TO ABOUT 0.075% AL2O3, BASIS NAH2PO4, WHICH COMPRISES HEATING IN A CLOSED CONTAINER A MIXTURE OF SAID SODIUM ACID PYROPHOSPHATE AND FROM 0.5% TO ABOUT 5% BY WEIGHT OF WATER FOR A SUFFICIENT PERIOD OF TIME TO INCREASE THE REACTION RATE OF SAID SODIUM ACID PYROPHOSPHATE TO A VALUE WITHIN THE RANGE OF 32 TO 40.
Claim 2
Independent Claim
175 words
THE METHOD OF PREPARING SODIUM ACID PYROPHOSPHATE HAVING SUBSTANTIALLY IMPROVED DOUGHNUT BAKING PROPERTIES FROM SODIUM ACID PYROPHOSPHATE PREPARED BY THERMALLY EVAPORATING A MONOSODIUM ORTHOPHOSPHATE SOLUTION WITHIN A PERIOD OF LESS THAN 12 SECONDS TO PREDUCE SUBSTANTIALLY DRY NAH2PO4, HEATING SAID NAH2PO4, IN AN ATMOSPHERE CONTAINING WATER VAPOR AT A PARTIAL PRESSURE OF ABOUT 100 MM. TO ABOUT 140 MM. OF MERCURY, TO A TEMPERATURE OF ABOUT 225* C. TO ABOUT 235*C. UNTIL SODIUM ACID PYROPHOSPHATE HAS BEEN FORMED AND THEREAFTER TEMPERING SAID PYROPHOSPHATE BY MAINTAINING IT AT A TEMPATURE AT ABOUT 225*C. TO ABOUT 235*C. FOR A PERIOD OF ABOUT 4 TO ABOUT 6 HOURS, SAID SODIUM ORTHOPHOSPHATE SOLUTION CONTAINING ABOUT 0.10% TO ABOUT 0.20% K20 AND ABOUT 0.025% TO ABOUT 0.075% AL2O3, BASIS NAH2PO4, WHICH COMPRISES HEATING IN A CLOSED CONTAINER A MIXTURE OF SAID SODIUM ACID PYROPHOSPHATE AND FROM 0.5% TO ABOUT 5% BY WEIGHT OF WATER FOR A SUFFICIENT PERIOD OF TIME TO INCREASE THE REACTION RATE OF SAID SODIUM ACID PYROPHOSPHATE TO A VALUE WITHIN THE RANGE OF 32 TO 40.
References Cited (Backward Citations)
US2408258A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |