Patent US2904513A successfully refreshed from Google Patents.
US2904513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic phosphate compositions, and methods for the preparation and utilization thereof
Assignee: Monsanto Chemicals Ltd
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Filing: 1954-04-16
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Granted: 1959-09-15
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Expires: 1974-04-16
Abstract
No abstract record available.
Inventors
- 👤 Joe S Metcalf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40; C01B25/41; C01B25/418
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
AN ANHYDROUS INTIMATELY INTERMIXED PHYSICAL ADMIXTURE OF ANHYDROUS SODIUM TRIPOLYPHOSPHATE CONTAINING LESS THAN 10 WEIGHT PERCENT OF SODIUM TRIPOLYPHOSPHATE-1, AND BETWEEN ABOUT 0.01 WEIGHT PERCENT AND ABOUT 10 WEIGHT PERCENT OF A WATER-SOLUBLE LINEARLY POLYMERIC PHOSPHATE SALT HAVING A CHAIN LENGTH GREATER THAN 3.
Claim 2
Dependent Claim
44 words
AN ANHYDROUS INTIMATELY INTERMIXED PHYSICAL ADMIXTURE OF ANHYDROUS SODIUM TRIPOLYPHOSPHATE CONTAINING LESS THAN 10 WEIGHT PERCENT OF SODIUM TRIPOLYPHOSPHATE-1, AND BETWEEN ABOUT 0.01 WEIGHT PERCENT AND ABOUT 10 WEIGHT PERCENT OF A WATER-SOLUBLE LINEARLY POLYMERIC PHOSPHATE SALT HAVING A CHAIN LENGTH GREATER THAN 3.
Claim 3
Independent Claim
88 words
THE METHOD OF RETARDING CRYSTALIZATION OF HYDRATED SODIUM TRIPOLYPHOSPHATE FROM SUPERSATURATED AQUEOUS SOLUTIONS FORMED BY DISSOLVING ANHYDROUS SODIUM TRIPOLYPHOSPHATE IN WATER, WHICH METHOD COMPRISES ADDING TO SAID WATER PRIOR TO INCORPORATION OF SAID ANHYDROUS SODIUM TRIPOLYPHOSPHATE A MINOR BUT EFFECTIVE CRYSTALLIZATION RETARDING CONCENTRATION LESS THAN ABOUT 10 WEIGHT PERCENT, BASED UPON THE TOTAL PHOSPHATES, OF A MIXTURE OF WATER-SOLUBLE LINEARLY POLYMERIC PHOSPHATE, OF A MIXTURE OF LENGTHS IN EXCESS OF 3, THE PREDOMINANT WATER-SOLUBLE LINEARLY POLYMERIC PHOSPHATE SALT IN SAID MIXTURE HAVING A CHAIN LENGTH GREATER THAN 5.
Claim 4
Independent Claim
88 words
THE METHOD OF RETARDING CRYSTALIZATION OF HYDRATED SODIUM TRIPOLYPHOSPHATE FROM SUPERSATURATED AQUEOUS SOLUTIONS FORMED BY DISSOLVING ANHYDROUS SODIUM TRIPOLYPHOSPHATE IN WATER, WHICH METHOD COMPRISES ADDING TO SAID WATER PRIOR TO INCORPORATION OF SAID ANHYDROUS SODIUM TRIPOLYPHOSPHATE A MINOR BUT EFFECTIVE CRYSTALLIZATION RETARDING CONCENTRATION LESS THAN ABOUT 10 WEIGHT PERCENT, BASED UPON THE TOTAL PHOSPHATES, OF A MIXTURE OF WATER-SOLUBLE LINEARLY POLYMERIC PHOSPHATE, OF A MIXTURE OF LENGTHS IN EXCESS OF 3, THE PREDOMINANT WATER-SOLUBLE LINEARLY POLYMERIC PHOSPHATE SALT IN SAID MIXTURE HAVING A CHAIN LENGTH GREATER THAN 5.
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) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |