US3066056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized dicalcium phosphate dihydrate
Assignee: Victor Chemical Works
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Filing: 1959-06-30
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Granted: 1962-11-27
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Expires: 1979-06-30
Abstract
No abstract record available.
Inventors
- 👤 Julian R Schlaeger
- 👤 Lowell E Netherton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF PRODUCING A STABILIZED DICALCIUM PHOSPHATE DIHYDRATE PRODUCT COMPRISING FIRST REACTING A DILUTE SOLUTION OF ORTHOPHOSPHORIC ACID WITH MILK OF LIME TO PRODUCE A REACTION MIXTURE HAVING A PH BETWEEN ABOUT 5 AND THE NEUTRALIZATION POINT, THEN ADDING ABOUT 0.4-8% BY WEIGHT OF A POLYPHOSPHORIC ACID HAVING AT LEAST 40% BY WEIGHT PYROPHOSPHORIC ACID, THEN COMPLETING THE NEUTRALIZATION OF THE REACTION MIXTURE WITH THE ADDITION OF MILK OF LIME UNTIL A PH OF ABOUT 6.9-7.2 IS REACHED, REMOVING AND DRYING THE DICALCIUM PHOSPHATE DIHYDRATE FORMED FROM THE REACTION MIXTURE, THEN ADMIXING A EFFECTIVE, STABILIZING AMOUNT OF FINELY DIVIDED CALCIUM-SODIUM PYROPHOSPHATE WITH THE PYROPHOSPHROIC ACID-MODIFIED DICALCIUM PHOSPHATE DIHYDRATE TO PRODUCE SAID STABILIZED DICALCIUM PHOSPHATE DIHDRATE PRODUCT, AND RECOVERING A STABILIZED IMPROVED DICALCIUM PHOSPHATE DIHYDRATE PRODUCT.
Claim 2
Independent Claim
126 words
THE METHOD OF PRODUCING A STABILIZED DICALCIUM PHOSPHATE DIHYDRATE PRODUCT COMPRISING FIRST REACTING A DILUTE SOLUTION OF ORTHOPHOSPHORIC ACID WITH MILK OF LIME TO PRODUCE A REACTION MIXTURE HAVING A PH BETWEEN ABOUT 5 AND THE NEUTRALIZATION POINT, THEN ADDING ABOUT 0.4-8% BY WEIGHT OF A POLYPHOSPHORIC ACID HAVING AT LEAST 40% BY WEIGHT PYROPHOSPHORIC ACID, THEN COMPLETING THE NEUTRALIZATION OF THE REACTION MIXTURE WITH THE ADDITION OF MILK OF LIME UNTIL A PH OF ABOUT 6.9-7.2 IS REACHED, REMOVING AND DRYING THE DICALCIUM PHOSPHATE DIHYDRATE FORMED FROM THE REACTION MIXTURE, THEN ADMIXING A EFFECTIVE, STABILIZING AMOUNT OF FINELY DIVIDED CALCIUM-SODIUM PYROPHOSPHATE WITH THE PYROPHOSPHROIC ACID-MODIFIED DICALCIUM PHOSPHATE DIHYDRATE TO PRODUCE SAID STABILIZED DICALCIUM PHOSPHATE DIHDRATE PRODUCT, AND RECOVERING A STABILIZED IMPROVED DICALCIUM PHOSPHATE DIHYDRATE PRODUCT.
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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) | 1965-11-26 | 1966-05-28 | 1966-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-26 | 1970-05-28 | 1970-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-26 | 1974-05-28 | 1974-11-27 | $7700.00 | Window Closed / Lapsed |