US2930773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel composition and method of curing epoxy resins
Assignee: General Mills Inc
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Filing: 1956-01-30
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Granted: 1960-03-29
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Expires: 1976-01-30
Abstract
No abstract record available.
Inventors
- 👤 Malcolm M Renfrew
- 👤 Dwight E Peerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:31
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
METHOD FOR CURING GLYCIDYL POLYETHERS OF 2,2-BIS (P-HYDROXY PHENYL) PROPANE HAVING AN EPOXY EQUIVALENT WEIGHT OF 125 TO 400 WHICH COMPRISES REACTING SAID GLYCIDYL POLYETHERS WITH A MIXTURE COMPOSED OF FROM 2 TO 50% OF AROMATIC DIAMINES HAVING THE STRUCTUAL FORMULA H2NR''NH2 WHERE R'' IS AN ARYLENE RADICAL HAVNG FROM 1 TO 5 AROMATIC NUCLEI AND FROM 50 TO 98% OF POLYAMIDES, SAID POLYAMIDES BEING THE REACTION PRODUCT OF POLYMERIC FAT ACIDS AND ALIPHATIC AMINES HAVING THE STRUCTURAL FORMULA H2N(RNH)XH WHERE R IS AN ALKYLENE RADICAL AND X IS AN INTEGER OF FROM 1 TO 5.
Claim 2
Dependent Claim
96 words
METHOD FOR CURING GLYCIDYL POLYETHERS OF 2,2-BIS (P-HYDROXY PHENYL) PROPANE HAVING AN EPOXY EQUIVALENT WEIGHT OF 125 TO 400 WHICH COMPRISES REACTING SAID GLYCIDYL POLYETHERS WITH A MIXTURE COMPOSED OF FROM 2 TO 50% OF AROMATIC DIAMINES HAVING THE STRUCTUAL FORMULA H2NR''NH2 WHERE R'' IS AN ARYLENE RADICAL HAVNG FROM 1 TO 5 AROMATIC NUCLEI AND FROM 50 TO 98% OF POLYAMIDES, SAID POLYAMIDES BEING THE REACTION PRODUCT OF POLYMERIC FAT ACIDS AND ALIPHATIC AMINES HAVING THE STRUCTURAL FORMULA H2N(RNH)XH WHERE R IS AN ALKYLENE RADICAL AND X IS AN INTEGER OF FROM 1 TO 5.
References Cited (Backward Citations)
US2705223A
Cited
US2801229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |