US3012937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron resin salt and method of making
Assignee: Janssen Pharmaceuticals Inc
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Filing: 1958-08-11
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Granted: 1961-12-12
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Expires: 1978-08-11
Abstract
No abstract record available.
Inventors
- 👤 David A Schlichting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:48
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; A; A61; A61K; A61K31/00; A61K31/28; A61K31/295; A61K33/00; A61K33/24; A61K33/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A MIXTURE OF A FERROUS IRON SALT OF A NUCLEAR SULFONIC CATION EXCHANGE RESINOUS COPOLYMER OF STYRENE AND DIVINYLBENZENE IN WHICH POLYSTYRENE IS CROSS-LINKED WITH FROM ABOUT 5% TO ABOUT 15%, BY WEIGHT, OF DIVINYLBENZENE BASED ON THE WEIGHT OF THE STYRENE AND WHICH CONTAINS BETWEEN ONE AND TWO SULFONIC ACID GROUPS PER BENZENE RING, SAID SALT CONTAINING FROM ABOUT 5 TO ABOUT 15% OF IRON, AND OF A FERROUS IRON SALT OF A CATION EXCHANGE RESINOUS COPOLYMER OF ACRYLIC ACID AND DIVINYLBENZENE IN WHICH POLYACRYLIC ACID IS CROSS-LINKED WITH FROM ABOUT 3% TO ABOUT 10%, BY WEIGHT, OF DIVINYL-
Claim 2
Dependent Claim
100 words
A MIXTURE OF A FERROUS IRON SALT OF A NUCLEAR SULFONIC CATION EXCHANGE RESINOUS COPOLYMER OF STYRENE AND DIVINYLBENZENE IN WHICH POLYSTYRENE IS CROSS-LINKED WITH FROM ABOUT 5% TO ABOUT 15%, BY WEIGHT, OF DIVINYLBENZENE BASED ON THE WEIGHT OF THE STYRENE AND WHICH CONTAINS BETWEEN ONE AND TWO SULFONIC ACID GROUPS PER BENZENE RING, SAID SALT CONTAINING FROM ABOUT 5 TO ABOUT 15% OF IRON, AND OF A FERROUS IRON SALT OF A CATION EXCHANGE RESINOUS COPOLYMER OF ACRYLIC ACID AND DIVINYLBENZENE IN WHICH POLYACRYLIC ACID IS CROSS-LINKED WITH FROM ABOUT 3% TO ABOUT 10%, BY WEIGHT, OF DIVINYL-
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |