US2732352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary amino anion exchange resins
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:23
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/14; B01J41/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PHENOL - FORMALDEHYDE - ALKYLENEPOLYAMINE EXCHANGE RESIN IN SOLID PARTICULATE FROM HAVING DIMENSIONAL STABILITY AND A POROUS STRUCTURE CAPABLE OF EFFECTIVELY ADSORBING ORGANIC ANIONS, AND CHARACTERIZED BY THE FACT THAT THE NITROGEN-CONTAINING GROUPS ARE EXCLUSIVELY TERTIARY AMINO GROUPS, IN WHICH METHYL GROUPS ARE SUBSTITUTED FOR HYDROGEN ON THE NITROGEN OF THE RESIN.
Claim 2
Dependent Claim
53 words
A PHENOL - FORMALDEHYDE - ALKYLENEPOLYAMINE EXCHANGE RESIN IN SOLID PARTICULATE FROM HAVING DIMENSIONAL STABILITY AND A POROUS STRUCTURE CAPABLE OF EFFECTIVELY ADSORBING ORGANIC ANIONS, AND CHARACTERIZED BY THE FACT THAT THE NITROGEN-CONTAINING GROUPS ARE EXCLUSIVELY TERTIARY AMINO GROUPS, IN WHICH METHYL GROUPS ARE SUBSTITUTED FOR HYDROGEN ON THE NITROGEN OF THE RESIN.
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |