Patent US3257342A successfully refreshed from Google Patents.
US3257342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resins cured with polyaminopoly-amides from diaminopolyethers and dicarboxylicacids
Assignee: 3M Co
•
Filing: 1962-02-19
•
Granted: 1966-06-21
•
Expires: 1982-02-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph N S Kwong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:44
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
AN EPOXY RESIN COMPOSITION WHICH HAS GOOD POT LIFE AND LOW EXOTHERM WHEN CURED IN LARGE MASSES BUT WHICH CURES AT ORDINARY ROOM TEMPERATURES TO PROVIDE PRODUCTS HAVING EXCLLENT RESISTANCE TO THERMAL AND MECHANICAL SHOCK, SAID COMPOSITION COMPRISING A MIXTURE OF (1) POLYGLYCIDYL ETHER AND (2) AN AMINO-TERMINATED POLYAMIDE OF (A) POLYMERIC FAT ACID AND (B) A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
61 words
AN EPOXY RESIN COMPOSITION WHICH HAS GOOD POT LIFE AND LOW EXOTHERM WHEN CURED IN LARGE MASSES BUT WHICH CURES AT ORDINARY ROOM TEMPERATURES TO PROVIDE PRODUCTS HAVING EXCLLENT RESISTANCE TO THERMAL AND MECHANICAL SHOCK, SAID COMPOSITION COMPRISING A MIXTURE OF (1) POLYGLYCIDYL ETHER AND (2) AN AMINO-TERMINATED POLYAMIDE OF (A) POLYMERIC FAT ACID AND (B) A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2327116A
Cited
US2359867A
Cited
GB574713A
Cited
US2705223A
Cited
US2723241A
Cited
US2880197A
Cited
US3019076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |