US3012852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized calcium phosphates and process therefor
Assignee: Monsanto Chemicals Ltd
•
Filing: 1956-06-06
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Granted: 1961-12-12
•
Expires: 1976-06-06
Abstract
No abstract record available.
Inventors
- 👤 Nelson George Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:27
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/322; A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61Q; A61Q11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD WHICH COMPRISES ADDING TO ORTHOPHOSPHORIC ACID A MINOR AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYROPHOSPHORIC ACID AND PYROPHOSPHATE SALTS WHICH ARE SOLUBLE IN ORTHOPHOSPHORIC ACID AND WHICH IONIZE IN ORTHOPHOSPHORIC ACID TO PRODUCE PYROPHOSPHATE IONS, AND THEREAFTER REACTING THE FOREGOING MIXTURE WITH AN ALKALINE EARTH COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESIUM OXIDES AND HYDROXIDES TO PRECIPITATE THE CORRESPONDING DIBASIC ALKALINE EARTH ORTHOPHOSPHATE HYDRATE.
Claim 2
Independent Claim
73 words
A METHOD WHICH COMPRISES ADDING TO ORTHOPHOSPHORIC ACID A MINOR AMOUNT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYROPHOSPHORIC ACID AND PYROPHOSPHATE SALTS WHICH ARE SOLUBLE IN ORTHOPHOSPHORIC ACID AND WHICH IONIZE IN ORTHOPHOSPHORIC ACID TO PRODUCE PYROPHOSPHATE IONS, AND THEREAFTER REACTING THE FOREGOING MIXTURE WITH AN ALKALINE EARTH COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESIUM OXIDES AND HYDROXIDES TO PRECIPITATE THE CORRESPONDING DIBASIC ALKALINE EARTH ORTHOPHOSPHATE HYDRATE.
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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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |