Patent US2891015A successfully refreshed from Google Patents.
US2891015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxylic acid type cation exchange resins prepared in the presence of plasticizer and polymer
Assignee: Asahi Chemical Industry Co Ltd
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Filing: 1954-08-24
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Granted: 1959-06-16
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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 18:19
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08J; C08J5/00; C08J5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A SOLID UNFRACTURED CATION EXCHANGE RESIN HAVING AT LEAST TWO DIMENSIONS EACH IN EXCESS OF ONE CM, AND COMPRISING A THREE DIMENSIONALLY CROSSLINKED POLYMER MATRIX BONDED TO CARBOXYLIC ACTION EXCHANGE GROUPS; SAID MATRIX BEING POLYMERIZATION PRODUCT OF A SOLUTION MIXTURE OF (I) MONOVINYL COMPOUND HAVING THE STRUCTURE
Claim 2
Dependent Claim
47 words
A SOLID UNFRACTURED CATION EXCHANGE RESIN HAVING AT LEAST TWO DIMENSIONS EACH IN EXCESS OF ONE CM, AND COMPRISING A THREE DIMENSIONALLY CROSSLINKED POLYMER MATRIX BONDED TO CARBOXYLIC ACTION EXCHANGE GROUPS; SAID MATRIX BEING POLYMERIZATION PRODUCT OF A SOLUTION MIXTURE OF (I) MONOVINYL COMPOUND HAVING THE STRUCTURE
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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 |