US3095269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of calcium hydrogen phosphate dihydrate to the anhydrous form
Assignee: GTE Sylvania Inc
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Filing: 1960-10-12
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Granted: 1963-06-25
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Expires: 1980-10-12
Abstract
No abstract record available.
Inventors
- 👤 Chiola Vincent
- 👤 Clarence D Vanderpool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/327; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR CONVERTING CALCIUM HYDROGEN PHOSPHATE DIHYDRATE TO ANHYDROUS CALCIUM HYDROGEN PHOSPHATE, WHICH PROCESS COMPRISES ADJUSTING THE PH OF THE DIHYDRATE IN ITS OWN MOTHER LIQUOR TO A VALUE BETWEEN ABOUT 2.5 TO 5.5, BY ADDING ACID, THEN HEATING THE DIHYDRATE IN ITS OWN MOTHER LIQUOR TO A TEMPERATURE BETWEEN ABOUT 65*C AND ITS BOILING POINT UNTIL THE PH DROPS SUBSTANTIALLY BELOW ITS INITIAL VALUE TO A VALUE BETWEEN ABOUT 2.2 TO 3.6, AND RECOVERING THE RESULTANT ANHYDROUS PHOSPHATE FROM THE REMAINING MOTHER LIQUOR.
Claim 2
Dependent Claim
85 words
A PROCESS FOR CONVERTING CALCIUM HYDROGEN PHOSPHATE DIHYDRATE TO ANHYDROUS CALCIUM HYDROGEN PHOSPHATE, WHICH PROCESS COMPRISES ADJUSTING THE PH OF THE DIHYDRATE IN ITS OWN MOTHER LIQUOR TO A VALUE BETWEEN ABOUT 2.5 TO 5.5, BY ADDING ACID, THEN HEATING THE DIHYDRATE IN ITS OWN MOTHER LIQUOR TO A TEMPERATURE BETWEEN ABOUT 65*C AND ITS BOILING POINT UNTIL THE PH DROPS SUBSTANTIALLY BELOW ITS INITIAL VALUE TO A VALUE BETWEEN ABOUT 2.2 TO 3.6, AND RECOVERING THE RESULTANT ANHYDROUS PHOSPHATE FROM THE REMAINING MOTHER LIQUOR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |