US2853467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid aromatic diamines as curing agents for epoxy ether resins
Assignee: GAF Chemicals Corp
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Filing: 1956-01-04
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Granted: 1958-09-23
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Expires: 1976-01-04
Abstract
No abstract record available.
Inventors
- 👤 Bloom Albert
- 👤 Eldred V Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:49
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A HEAT CURING COMPOSITION COMPRISING A LIQUID GLYCIDYL POLYETHER OF A DIHYDRIC PHENOL HAVING AN EPOXIDE EQUIVALENT RANGING FROM 140 TO 290 IN ADMIXTURE WITH A CURING AMOUNT OF A LIQUID CATALYST COMPRISING 5 TO 95 PARTS BY WEIGHT OF A PHENYLENEDIAMINE AND 95 TO 5 PARTS BY WEIGHT OF AN AROMATIC DIAMINE OF THE GROUP CONSISTING OF TOLUENEDIAMINE, DIAMINONAPHTHALENE AND A N-ALKYL PHENYLENEDIAMINE WHEREIN THE ALKYL CONTAINS FROM 1 TO 5 CARBON ATOMS.
Claim 2
Dependent Claim
74 words
A HEAT CURING COMPOSITION COMPRISING A LIQUID GLYCIDYL POLYETHER OF A DIHYDRIC PHENOL HAVING AN EPOXIDE EQUIVALENT RANGING FROM 140 TO 290 IN ADMIXTURE WITH A CURING AMOUNT OF A LIQUID CATALYST COMPRISING 5 TO 95 PARTS BY WEIGHT OF A PHENYLENEDIAMINE AND 95 TO 5 PARTS BY WEIGHT OF AN AROMATIC DIAMINE OF THE GROUP CONSISTING OF TOLUENEDIAMINE, DIAMINONAPHTHALENE AND A N-ALKYL PHENYLENEDIAMINE WHEREIN THE ALKYL CONTAINS FROM 1 TO 5 CARBON ATOMS.
References Cited (Backward Citations)
US2682490A
Cited
US2712535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |