US2946757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary ammonium ion exchange resins of improved properties
Assignee: Individual
•
Filing: 1955-05-02
•
Granted: 1960-07-26
•
Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 George B Butler
- 👤 Robert L Goette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:46
CPC Classifications
C; C08; C08F; C08F26/00; C08F26/02; Y; Y10; Y10S; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
CROSS-LINKED, WATER INSOLUBLE POLYMERS OF SYMMETRICALLY-SUBSTITUTED QUATERNARY AMMONIUM SALTS OF THE STRUCTURE:
Claim 2
Dependent Claim
12 words
CROSS-LINKED, WATER INSOLUBLE POLYMERS OF SYMMETRICALLY-SUBSTITUTED QUATERNARY AMMONIUM SALTS OF THE STRUCTURE:
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |