US2898310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly-basic anion exchange resins from epihalohydrins and tertiary - amino containing alkylenepolyamines
Assignee: Pfaudler Permutit Inc
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Filing: 1956-08-08
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Granted: 1959-08-04
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Expires: 1976-08-08
Abstract
No abstract record available.
Inventors
- 👤 Albert H Greer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:00
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A WATER-INSOLUBLE, HIGHLY-BASIC ANION EXCHANGE RESIN COMPRISING A CONDENSATE OF AN EPIHALOHYDRIN AND AN ALKYLENEPOLYAMINE, THE LATTER HAVING AT LEAST ONE TERTIARY AMINO GROUP THE MOLECULAR RATIO OF EPIHALOHYDRIN TO ALKLENEPOLYAMINE BEING AT LEAST ABOUT 1:1 RESPECTIVELY.
Claim 2
Dependent Claim
37 words
A WATER-INSOLUBLE, HIGHLY-BASIC ANION EXCHANGE RESIN COMPRISING A CONDENSATE OF AN EPIHALOHYDRIN AND AN ALKYLENEPOLYAMINE, THE LATTER HAVING AT LEAST ONE TERTIARY AMINO GROUP THE MOLECULAR RATIO OF EPIHALOHYDRIN TO ALKLENEPOLYAMINE BEING AT LEAST ABOUT 1:1 RESPECTIVELY.
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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |