Patent US2897179A successfully refreshed from Google Patents.
US2897179A
Expired / Lapsed
US
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Hardener for epoxy resin composition
Assignee: Union Carbide Corp
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Filing: 1956-07-18
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Granted: 1959-07-28
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Expires: 1976-07-18
Abstract
No abstract record available.
Inventors
- 👤 Shechter Leon
- 👤 Wynstra John
- 👤 Norman H Reinking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:28
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
HARDENABLE COMPOSITION COMPRISING A MIXTURE OF A COMPOUND CONTAINING TERMINAL 1,2-EPOXY GROUPS AND HAVING AN EPOXY FUNCTIONALITY GREATER THAN ONE SELECTED FROM THE GROUP CONSISTING OG GLYCIDYL POLYETHERS OF POLYHYDRIC PHENOLS AND N-GLYCIDYL AROMATIC AMINES AND AN ALICYCLIC AMINE CORRESPONDING TO THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
44 words
HARDENABLE COMPOSITION COMPRISING A MIXTURE OF A COMPOUND CONTAINING TERMINAL 1,2-EPOXY GROUPS AND HAVING AN EPOXY FUNCTIONALITY GREATER THAN ONE SELECTED FROM THE GROUP CONSISTING OG GLYCIDYL POLYETHERS OF POLYHYDRIC PHENOLS AND N-GLYCIDYL AROMATIC AMINES AND AN ALICYCLIC AMINE CORRESPONDING TO THE FOLLOWING FORMULA:
References Cited (Backward Citations)
GB630663A
Cited
US2632022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |