US2677670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Choline carboxylate cationexchange resins
Assignee: Rohm and Haas Co
•
Filing: 1952-02-21
•
Granted: 1954-05-04
•
Expires: 1972-02-21
Abstract
No abstract record available.
Inventors
- 👤 Kunin Robert
- 👤 Rothman Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:40
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
AS A NEW COMPOSITION OF MATTER, A CARBOXYLIC CATION-EXCHANGE RESIN, FUNCTIONAL GROUPS OF WHICH ARE IN THE FORM OF TRIMETHYLHYDROXYETHYLAMMONIUM CARBOXYLATE GROUPS.
Claim 2
Dependent Claim
22 words
AS A NEW COMPOSITION OF MATTER, A CARBOXYLIC CATION-EXCHANGE RESIN, FUNCTIONAL GROUPS OF WHICH ARE IN THE FORM OF TRIMETHYLHYDROXYETHYLAMMONIUM CARBOXYLATE GROUPS.
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) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |