US2844552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of mixtures of polyamide, epoxy resin solutions with formic acid
Assignee: General Mills Inc
•
Filing: 1954-02-23
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Granted: 1958-07-22
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Glaser David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:32
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A MIXTURE OF AN EPOXY RESINOUS MATERIAL CONTAINING TERMINAL EPOXY GROUPS, AND A POLYAMIDE HAVING AN AMINE NUMBER OF AT LEAST 50 AND BEING DERIVED FROM THE REACTION OF POLYMERIC FAT ACIDS AND A POLYALKYLENE POLYAMINE, THE MIXTURE BEING STABILIZED AGAINST GELATION BY MEANS OF FORMIC ACID VARYING IN QUANTITY FROM 25 TO 100% OF THE QUANTITY EQUIVALENT TO THE FREE AMINE GROUPS IN THE POLYAMIDE RESIN.
Claim 2
Dependent Claim
67 words
A MIXTURE OF AN EPOXY RESINOUS MATERIAL CONTAINING TERMINAL EPOXY GROUPS, AND A POLYAMIDE HAVING AN AMINE NUMBER OF AT LEAST 50 AND BEING DERIVED FROM THE REACTION OF POLYMERIC FAT ACIDS AND A POLYALKYLENE POLYAMINE, THE MIXTURE BEING STABILIZED AGAINST GELATION BY MEANS OF FORMIC ACID VARYING IN QUANTITY FROM 25 TO 100% OF THE QUANTITY EQUIVALENT TO THE FREE AMINE GROUPS IN THE POLYAMIDE RESIN.
References Cited (Backward Citations)
US2739140A
Cited
US2707708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |