Patent US2852341A successfully refreshed from Google Patents.
US2852341A
Expired / Lapsed
US
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Calcium polyphosphate and method of producing the same
Assignee: Victor Chemical Works
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Filing: 1954-08-20
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Granted: 1958-09-16
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
- 👤 Russell N Bell
- 👤 Lowell E Netherton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:43
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR PRODUCING WATER-INSOLUBLE CALCIUM POLYHOSHPATE HAVING SUB-MICROSCOPIC CRYSTALS OF LESS THAN ONE MICRON SIZE AND THE PROPERTY OF STABLIZING NORMALLY HYGROSCOPIC MATERIALS, WHICH COMPRISES ADDING A 5 TO 15% SOLUTION OF AN ALKALI METAL TRIPLOYPHOSPHATE TO A 2 TO 10% SOLUTION OF A SOLUBLE CALCIUM SALT AT A TEMPERATURE BETWEEN 50* AND 100*C.,RAPIDLY ADJUSTING THE PH OF THE RESULTING SLURRY TO APPROXIMATELY 7-10, IMMEDIATELY REMOVING THE RESULTING CRYSTALS OF CALCIUM POLYPHOSPHATE FROM THE REACTION MIXTURE, AND DRYING THE SAME.
Claim 2
Dependent Claim
81 words
A PROCESS FOR PRODUCING WATER-INSOLUBLE CALCIUM POLYHOSHPATE HAVING SUB-MICROSCOPIC CRYSTALS OF LESS THAN ONE MICRON SIZE AND THE PROPERTY OF STABLIZING NORMALLY HYGROSCOPIC MATERIALS, WHICH COMPRISES ADDING A 5 TO 15% SOLUTION OF AN ALKALI METAL TRIPLOYPHOSPHATE TO A 2 TO 10% SOLUTION OF A SOLUBLE CALCIUM SALT AT A TEMPERATURE BETWEEN 50* AND 100*C.,RAPIDLY ADJUSTING THE PH OF THE RESULTING SLURRY TO APPROXIMATELY 7-10, IMMEDIATELY REMOVING THE RESULTING CRYSTALS OF CALCIUM POLYPHOSPHATE FROM THE REACTION MIXTURE, AND DRYING THE SAME.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |