Patent US2772248A successfully refreshed from Google Patents.
US2772248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble epoxy-amine resins
Assignee: Interchemical Corp
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Filing: 1953-05-04
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Granted: 1956-11-27
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Expires: 1973-05-04
Abstract
No abstract record available.
Inventors
- 👤 Emanuel R Lieberman
- 👤 Yuska Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:23
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF AN AMINE RESIN, SAID AMINE RESIN BEING THE REACTION PRODUCT OF AN ALIPHATIC POLYAMINE WITH A RESINOUS EPOXIDE HAVING AN EPOXIDE EQUIVALENT OF 225 TO 1000 AND AT LEAST ONE 1,2-EPOXIDE GROUP PER MOLECULE AND HAVING ALTERNATING ALIPHATIC CHAINS AND AROMATIC NUCLEI UNITED THROUGH ETHER OXYGEN, SAID AMINE CONTAINING AT LEAST TWO NITROGEN ATOMS HAVING REACTIVE HYDROGEN AND CONTAINING NO ALIPHATIC CHAIN LONGER THAN 4 CARBON ATOMS, SAID AMINE RESIN BEING FURTHER CHARACTERIZED BY CONTAINING AT LEAST 1.5% NITROGEN AND BY BEING SOLUBLE IN DILUTE AQUEOUS SOLUTIONS OF ACID HAVING IONIZATION CONSTANTS LESS THAN 2X10-4.
Claim 2
Dependent Claim
103 words
AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF AN AMINE RESIN, SAID AMINE RESIN BEING THE REACTION PRODUCT OF AN ALIPHATIC POLYAMINE WITH A RESINOUS EPOXIDE HAVING AN EPOXIDE EQUIVALENT OF 225 TO 1000 AND AT LEAST ONE 1,2-EPOXIDE GROUP PER MOLECULE AND HAVING ALTERNATING ALIPHATIC CHAINS AND AROMATIC NUCLEI UNITED THROUGH ETHER OXYGEN, SAID AMINE CONTAINING AT LEAST TWO NITROGEN ATOMS HAVING REACTIVE HYDROGEN AND CONTAINING NO ALIPHATIC CHAIN LONGER THAN 4 CARBON ATOMS, SAID AMINE RESIN BEING FURTHER CHARACTERIZED BY CONTAINING AT LEAST 1.5% NITROGEN AND BY BEING SOLUBLE IN DILUTE AQUEOUS SOLUTIONS OF ACID HAVING IONIZATION CONSTANTS LESS THAN 2X10-4.
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |