US2891014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonic cation exchange resins prepared in the presence of plasticizer and polymer
Assignee: Asahi Chemical Industry Co Ltd
•
Filing: 1954-08-24
•
Granted: 1959-06-16
•
Expires: 1974-08-24
Abstract
No abstract record available.
Inventors
- 👤 Tsunoda Yoshio
- 👤 Seko Maomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:03
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J47/00; B01J47/12; C; C08; C08F; C08F8/00; C08F8/44; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2287; C08F2800/00; C08F2800/20; C08J2325/00; C08J2325/02; C08J2325/04; C08J5/04; C08J5/0405; C08J5/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A SOLID UNFRACTURED CATION EXCHANGE RESIN HAVING AT LEAST TWO DIMENSIONS EACH IN EXCESS OF ONE CM., AND COMPRISING A THREE DEIMESIONALLY CROSSLINKED POLYMER MATRIX BONDED TO CATION EXCHANGE GROUPS; SAID MATRIX BEING A POLYMERIZATION PRODUCT OF A SOLUTION MIXTURE OF (1) STYRENE, (2) POLYSTYRENE, (3) DIVINYLBENZEND, AND (4) DIALKYLPHTHALATE AS A PLASTICIZER, SAID MIXTURE CONTAINING FROM 20% TO 90% BY WEIGHT OF STYRENE, FROM 0.05% TO 27% BY WEIGHT OF POLYSTYRENE, FROM 0.5% TO 27% BY WEIGHT OF DIVINYLBENZENE AND FROM 10% TO 50% BY WEIGHT OF DIALKYLPHTHALATE, AND SAID CATION EXCHANGE GROUPS BEING SULFONIC ACID GROUPS INTRODUCED BY SULFONATION OF SAID MATRIX.
Claim 2
Dependent Claim
104 words
A SOLID UNFRACTURED CATION EXCHANGE RESIN HAVING AT LEAST TWO DIMENSIONS EACH IN EXCESS OF ONE CM., AND COMPRISING A THREE DEIMESIONALLY CROSSLINKED POLYMER MATRIX BONDED TO CATION EXCHANGE GROUPS; SAID MATRIX BEING A POLYMERIZATION PRODUCT OF A SOLUTION MIXTURE OF (1) STYRENE, (2) POLYSTYRENE, (3) DIVINYLBENZEND, AND (4) DIALKYLPHTHALATE AS A PLASTICIZER, SAID MIXTURE CONTAINING FROM 20% TO 90% BY WEIGHT OF STYRENE, FROM 0.05% TO 27% BY WEIGHT OF POLYSTYRENE, FROM 0.5% TO 27% BY WEIGHT OF DIVINYLBENZENE AND FROM 10% TO 50% BY WEIGHT OF DIALKYLPHTHALATE, AND SAID CATION EXCHANGE GROUPS BEING SULFONIC ACID GROUPS INTRODUCED BY SULFONATION OF SAID MATRIX.
References Cited (Backward Citations)
US2732350A
Cited
US2665400A
Cited
US2734044A
Cited
US2418978A
Cited
US2318845A
Cited
US2420284A
Cited
US2500149A
Cited
US2468094A
Cited
US2500598A
Cited
US2527300A
Cited
US2700185A
Cited
US2730768A
Cited
US2731411A
Cited
US2697080A
Cited
US2731408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |