US3033900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing calcium glucoheptonate
Assignee: Ferro Pfanstiehl Laboratories Inc
•
Filing: 1958-03-25
•
Granted: 1962-05-08
•
Expires: 1978-03-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Holstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:40
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/41; C07C51/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF PREPARING CALCIUM GLUCOHEPTONATE COMPRISING CONTACTING AN AQUEOUS SOLUTION OF SODIUM GLUCOHEPTONATE HAVING A SULFATE ANOIN CONTENT BELOW 0.05%, CALCULATED AS CALCIUM SULFATE WITH A CATIONEXCHANGE RESIN THE EFFUENT FROM WHICH HAS A SULFATE ANOIN CONTENT BELOW 0.05%, CALCULATED AS CALIUM SULFATE UNTIL THE SODIUM CONTENT OF SAID SOLUTION IS BELOW 0.4 MG. PER MILLILITERS, HEATING THE RESULTING SOLUTION TO ABOUT 80* C. WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM CARBONATE AND CALCIUM HYDROXIDE, SAID MATERIAL HAVING A SULFATE ANOIN CONTENT BELOW ABOUT 0.05%, CALCULATED AS CALCIUM SULFATE, AND SAID MATERIAL BEING USED IN QUANTITY SUFFICIENT TO CONVERT THE TOTAL GLUCOHEPTONATE, CONVALUES IN SAID SOLUTION TO CALCIUM GLUCOHEPTONATE, CONCENTRATING THE RESULTING SOLUTION, AND RECOVERING SOLID AMORPHOUS CALCIUM GLUCOHEPTONATE FROM THE CONCENTRATED SOLUTION.
Claim 2
Independent Claim
127 words
THE METHOD OF PREPARING CALCIUM GLUCOHEPTONATE COMPRISING CONTACTING AN AQUEOUS SOLUTION OF SODIUM GLUCOHEPTONATE HAVING A SULFATE ANOIN CONTENT BELOW 0.05%, CALCULATED AS CALCIUM SULFATE WITH A CATIONEXCHANGE RESIN THE EFFUENT FROM WHICH HAS A SULFATE ANOIN CONTENT BELOW 0.05%, CALCULATED AS CALIUM SULFATE UNTIL THE SODIUM CONTENT OF SAID SOLUTION IS BELOW 0.4 MG. PER MILLILITERS, HEATING THE RESULTING SOLUTION TO ABOUT 80* C. WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM CARBONATE AND CALCIUM HYDROXIDE, SAID MATERIAL HAVING A SULFATE ANOIN CONTENT BELOW ABOUT 0.05%, CALCULATED AS CALCIUM SULFATE, AND SAID MATERIAL BEING USED IN QUANTITY SUFFICIENT TO CONVERT THE TOTAL GLUCOHEPTONATE, CONVALUES IN SAID SOLUTION TO CALCIUM GLUCOHEPTONATE, CONCENTRATING THE RESULTING SOLUTION, AND RECOVERING SOLID AMORPHOUS CALCIUM GLUCOHEPTONATE FROM THE CONCENTRATED SOLUTION.
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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |