US2658042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange resins from formaldehyde and the reaction product of a chloromethylated polynuclear hydrocarbon and a basic tertiary amine
Assignee: ChampionX LLC
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Filing: 1952-02-02
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Granted: 1953-11-03
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Expires: 1972-02-02
Abstract
No abstract record available.
Inventors
- 👤 Johnson Carl Erick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:07
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A WATER INSOLUBLE ION EXCHANGE RESINOUS MATERIAL OBTAINED BY CONDENSING (A) FORMALDEHYDE AND (B) THE MONOMERIC QUATERNARY AMINE PRODUCT OF THE REACTION OF A CHLOROMETHYLATED POLYNUCLEAR AROMATIC HYDROCARBON AND A BASIC TERTIARY AMINE.
Claim 2
Dependent Claim
33 words
A WATER INSOLUBLE ION EXCHANGE RESINOUS MATERIAL OBTAINED BY CONDENSING (A) FORMALDEHYDE AND (B) THE MONOMERIC QUATERNARY AMINE PRODUCT OF THE REACTION OF A CHLOROMETHYLATED POLYNUCLEAR AROMATIC HYDROCARBON AND A BASIC TERTIARY AMINE.
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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |