US3236593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of a mineral feed additive essentially consisting of dicalcium phosphate
Assignee: Knapsack AG
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Filing: 1963-03-19
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Granted: 1966-02-22
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Expires: 1983-03-19
Abstract
No abstract record available.
Inventors
- 👤 Hartmann Fridolin
- 👤 Cremer Josef
- 👤 Rodis Hildegard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:55
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/322; A; A23; A23K; A23K20/00; A23K20/20; A23K20/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS FOR THE MANUFACTURE OF A MINERAL FEED ADDITIVE CONSISTING ESSENTIALLY OF DICALCIUM PHOSPHATE WHEREIN CONCENTRATED PHOSPHORIC ACID HAVING A CONCENTRATION FROM 84% TO 85% BY WEIGHT IS ADDED TO PULVERIZED DRY LIMESTONE IN AN AMOUNT TO FORM CAHPO4-2H2O, THE LIMESTONE-ACID MIXTURE BEING MIXED WHILE ADDING THE ACID, AND RIPENING THE PRODUCT FORMED BY HEATING THE SAME AT A TEMPERATURE OF 30-80*C. FOR A PERIOD OF 6-48 HOURS.
Claim 2
Dependent Claim
69 words
A PROCESS FOR THE MANUFACTURE OF A MINERAL FEED ADDITIVE CONSISTING ESSENTIALLY OF DICALCIUM PHOSPHATE WHEREIN CONCENTRATED PHOSPHORIC ACID HAVING A CONCENTRATION FROM 84% TO 85% BY WEIGHT IS ADDED TO PULVERIZED DRY LIMESTONE IN AN AMOUNT TO FORM CAHPO4-2H2O, THE LIMESTONE-ACID MIXTURE BEING MIXED WHILE ADDING THE ACID, AND RIPENING THE PRODUCT FORMED BY HEATING THE SAME AT A TEMPERATURE OF 30-80*C. FOR A PERIOD OF 6-48 HOURS.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |