US2605229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium phosphate gels
Assignee: Individual
•
Filing: 1949-04-23
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Granted: 1952-07-29
•
Expires: 1969-04-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph K Marcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/325; A; A61; A61K; A61K33/00; A61K33/06; B; B01; B01J; B01J13/00; B01J13/0073; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
PROCESS OF PRODUCING A HYDROUS CALCIUM PHOSPHATE GEL WHICH COMPRISES REACTING AN AQUEOUS SOLUTION OF A WATER SOLUBLE CALCIUM SALT WITH AN AQUEOUS SOLUTION OF WATER SOLUBLE DI-BASIC AND TRI-BASIC PHOSPHATES CONTAINING NO ANION CAPABLE OF PRODUCING AN INSOLUBLE CALCIUM SALT OTHER THAN CALCIUM PHOSPHATE THE MOLAR RATIO OF THE TRI-BASIC PHOSPHATE TO THE DI-BASIC PHOSPHATE PER MOLE OF CALCIUM SALT LESS THAN 1.55, FILTERING AND WASHING THE PRECIPITATE AND ADDING TO THE WASHED PRECIPITATE A COMPOUND CAPABLE OF REMOVING HYDROGEN IONS IN AN AMOUNT SUFFICIENT TO REMOVE THE HYDROGEN IONS PRODUCED BY HYDROLYSIS OF THE GEL.
Claim 2
Dependent Claim
97 words
PROCESS OF PRODUCING A HYDROUS CALCIUM PHOSPHATE GEL WHICH COMPRISES REACTING AN AQUEOUS SOLUTION OF A WATER SOLUBLE CALCIUM SALT WITH AN AQUEOUS SOLUTION OF WATER SOLUBLE DI-BASIC AND TRI-BASIC PHOSPHATES CONTAINING NO ANION CAPABLE OF PRODUCING AN INSOLUBLE CALCIUM SALT OTHER THAN CALCIUM PHOSPHATE THE MOLAR RATIO OF THE TRI-BASIC PHOSPHATE TO THE DI-BASIC PHOSPHATE PER MOLE OF CALCIUM SALT LESS THAN 1.55, FILTERING AND WASHING THE PRECIPITATE AND ADDING TO THE WASHED PRECIPITATE A COMPOUND CAPABLE OF REMOVING HYDROGEN IONS IN AN AMOUNT SUFFICIENT TO REMOVE THE HYDROGEN IONS PRODUCED BY HYDROLYSIS OF THE GEL.
References Cited (Backward Citations)
US2487600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |