Patent US2668147A successfully refreshed from Google Patents.
US2668147A
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Process for producing a material containing sodium polyphosphates
Assignee: Henkel AG and Co KGaA
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Filing: 1951-10-27
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Granted: 1954-02-02
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Expires: 1971-10-27
Abstract
No abstract record available.
Inventors
- 👤 Blaser Bruno
- 👤 Weldes Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:22
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
A PROCESS FOR PRODUCING A MATERIAL CONTAINING SODIUM POLYPHOSPHATES WHICH COMPRISES MAKING A SOLUTION CONTAINING A MIXTURE OF MONOSODIUM PHOSPHATE, DISODIUM PHOSPHATE AND SODIUM SULFATE IN AN AMOUNT SUFFICIENT TO GIVE A CONTENT OF 10-30% BY WEIGHT OF SODIUM SULFATE IN THE FINAL PRODUCT, CONCENTRATING SAID SOLUTION, FLASH-DRYING THE CONCENTRATE AT A TEMPERATURE ABOVE 100* C. UNTIL A DRY POWDER IS OBTAINED, AND HEATING SAID POWDER AT A TEMPERATURE RANGING FROM 270* C. TO 850* C., WHEREBY CONVERSION OF THE PHOSPHATES INTO POLYPHOSPHATES OCCURS.
References Cited (Backward Citations)
GB378345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |