US2977317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing compositions containing sodium tripolyphosphate
Assignee: Knapsack AG
•
Filing: 1955-10-10
•
Granted: 1961-03-28
•
Expires: 1975-10-10
Abstract
No abstract record available.
Inventors
- 👤 Rodis Franz
- 👤 Krause Johannes
- 👤 Beltz Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:03
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/06; C11D3/062; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/412; C01B25/414
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
PROCESS FOR PRODUCING SODIUM TRIPOLYPHOSPHATE CONSISTING OF BOTH THE HIGH-TEMPERATURE MODIFICATION FORM I AND THE LOW-TEMPERATURE MODIFICATION FORM II AND CONTAINING THE LOW-TEMPERATURE MODIFICATION FORM II IN A PORTION OF AT LEAST 30 PERCENT BY WEIGHT, COMPRISING SPRAYING AN AQUEOUS SODIUM ORTHOPHOSPHATE SOLUTION TOGETHER WITH HOT AIR INTO A SPRAY TOWER HAVING AN AIR ATMOSPHERE WHICH HAS A TEMPERATURE RANGE OF 200 TO 450* C., SAID AIR ATMOSPHERE CONTAINING AT LEAST 20 PERCENT BY VOLUME OF STEAM.
Claim 2
Dependent Claim
77 words
PROCESS FOR PRODUCING SODIUM TRIPOLYPHOSPHATE CONSISTING OF BOTH THE HIGH-TEMPERATURE MODIFICATION FORM I AND THE LOW-TEMPERATURE MODIFICATION FORM II AND CONTAINING THE LOW-TEMPERATURE MODIFICATION FORM II IN A PORTION OF AT LEAST 30 PERCENT BY WEIGHT, COMPRISING SPRAYING AN AQUEOUS SODIUM ORTHOPHOSPHATE SOLUTION TOGETHER WITH HOT AIR INTO A SPRAY TOWER HAVING AN AIR ATMOSPHERE WHICH HAS A TEMPERATURE RANGE OF 200 TO 450* C., SAID AIR ATMOSPHERE CONTAINING AT LEAST 20 PERCENT BY VOLUME OF STEAM.
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |