Patent US1844658A successfully refreshed from Google Patents.
Patent US3149081A successfully refreshed from Google Patents.
US3149081A
Expired / Lapsed
US
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Calcium phosphate catalysts and method of production
Assignee: Baugh Chemical Co
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Filing: 1959-12-14
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Granted: 1964-09-15
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Expires: 1979-12-14
Abstract
No abstract record available.
Inventors
- 👤 Robert S Bowman
- 👤 Louis J Piasecky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:27
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/002; B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1806; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
THAT METHOD OF MAKING CALCIUM ORTHOPHOSPHATE HAVING DISPERSED THEREIN AT LEAST ONE METAL OXIDE, COMPRISING MAKING AN AQUEOUS SOLUTION OF AT LEST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, COPPER, IRON, NICKEL, ZINC, AND CHROMIUM IN ORTHOPHOSPHORIC ACID, ADDING SAID SOLUTION OT AN AGITATED AQUEOUS SLURRY OF CALCIUM HYDROXIDE AT A RATE SUCH THAT THE SLURRY REMAINS ALKALINE, THE PROPORTIONS OF SAID ACID SOLUTION AND CALCIUM HYDROXIDE FORMING A CALCIUM ORTHOPHOSPHATE OF CAO:P2O5 RATIO FROM 1.18:1 TO 1.9:1, AND THEREBY PRECIPITATING SAID PHOSPHATE FROM THE SOLUTION WITH CONCURRENT DISPERSION OF OXIDE OF SAID MATERIAL THROUGH SAID PHOSPHATE, RECOVERING THE PRECIPITATED MATERIAL, AND DRYING IT.
Claim 2
Dependent Claim
106 words
THAT METHOD OF MAKING CALCIUM ORTHOPHOSPHATE HAVING DISPERSED THEREIN AT LEAST ONE METAL OXIDE, COMPRISING MAKING AN AQUEOUS SOLUTION OF AT LEST ONE METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, COPPER, IRON, NICKEL, ZINC, AND CHROMIUM IN ORTHOPHOSPHORIC ACID, ADDING SAID SOLUTION OT AN AGITATED AQUEOUS SLURRY OF CALCIUM HYDROXIDE AT A RATE SUCH THAT THE SLURRY REMAINS ALKALINE, THE PROPORTIONS OF SAID ACID SOLUTION AND CALCIUM HYDROXIDE FORMING A CALCIUM ORTHOPHOSPHATE OF CAO:P2O5 RATIO FROM 1.18:1 TO 1.9:1, AND THEREBY PRECIPITATING SAID PHOSPHATE FROM THE SOLUTION WITH CONCURRENT DISPERSION OF OXIDE OF SAID MATERIAL THROUGH SAID PHOSPHATE, RECOVERING THE PRECIPITATED MATERIAL, AND DRYING IT.
Claim 3
Dependent Claim
41 words
AS A NEW COMPOSITION, CALCIUM ORTHOPHOSPHATE OF CAO:P2O5 RATIO FROM 1.18:1 TO 1.9:1 HAVING DISPERSED THERETHROUGH AN OXIDE OF AT LEAST ONE METAL SOLUBLE IN PHOSPHORIC ACID AND SELECTED FROM THE GROUP CONSISTING OF COBALT, COPPER, IRON, NICKEL, ZINC AND CHROMIUM.
Claim 4
Dependent Claim
41 words
AS A NEW COMPOSITION, CALCIUM ORTHOPHOSPHATE OF CAO:P2O5 RATIO FROM 1.18:1 TO 1.9:1 HAVING DISPERSED THERETHROUGH AN OXIDE OF AT LEAST ONE METAL SOLUBLE IN PHOSPHORIC ACID AND SELECTED FROM THE GROUP CONSISTING OF COBALT, COPPER, IRON, NICKEL, ZINC AND CHROMIUM.
References Cited (Backward Citations)
US1882712A
Cited
US2338445A
Cited
US2291609A
Cited
US2542813A
Cited
US2631102A
Cited
US2829165A
Cited
US2763702A
Cited
US2816081A
Cited
US2920049A
Cited
US2813137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |