US2689833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous quaternary ammonium alkoxides
Assignee: Rohm and Haas Co
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Filing: 1951-09-21
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Granted: 1954-09-21
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Expires: 1971-09-21
Abstract
No abstract record available.
Inventors
- 👤 Jesse C H Hwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/02; C08F8/18; C08F8/24; C08F8/30; C08F8/32; C08F8/44; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCES OF PREPARING INSOLUBLE, INFUSIBLE, POLYMERIC QUATERNARY AMMONIUM ALKOXIDES WHICH COMPRISES REACTING A WEAKLY BASIC, INSOLULE, INFUSIBLE ANION-EXCHANGE RESIN CONTAINING POLAR, TERTIARY AMINO GROUPS WITH AN ALKYLENE OXIDE FROM THE CLASS CONSISTING OF ETHYLENE OXIDE, 1,2-PROPYLENE OXIDE, AND 1,3-PROPYLENE OXIDE AND WITH AN ALKANOL CONTAINING 1 TO 8 CARBON ATOMS AT A TEMPERATURE FROM 0* C. TO 100* C. UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS.
Claim 2
Dependent Claim
64 words
A PROCES OF PREPARING INSOLUBLE, INFUSIBLE, POLYMERIC QUATERNARY AMMONIUM ALKOXIDES WHICH COMPRISES REACTING A WEAKLY BASIC, INSOLULE, INFUSIBLE ANION-EXCHANGE RESIN CONTAINING POLAR, TERTIARY AMINO GROUPS WITH AN ALKYLENE OXIDE FROM THE CLASS CONSISTING OF ETHYLENE OXIDE, 1,2-PROPYLENE OXIDE, AND 1,3-PROPYLENE OXIDE AND WITH AN ALKANOL CONTAINING 1 TO 8 CARBON ATOMS AT A TEMPERATURE FROM 0* C. TO 100* C. UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS.
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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |