US3849375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latent curing epoxy resin-aromatic disulfonamide compositions
Assignee: Dow Chemical Co
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Filing: 1973-04-02
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Granted: 1974-11-19
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Expires: 1993-04-02
Abstract
Abstract 1. A LATENT CURING EPOXY RESIN COMPOSITION COMPRISING: (1) AN EPOXY RESIN HAVING AN AVERAGE OF MORE THAN ONE 1,2-EPOXY GROUP PER MOLECULE AND (2) AN AROMATIC DISULFONAMIDE; WHEREIN COMPONENTS (1) AND (2) ARE PRESENT IN QUANTITIES SO AS TO PROVIDE A SULFONAMIDE HYDROGEN EQUIVALENT: EPOXY EQUIVALENT RATIO OF AT LEAST ABOUT 0.9:1.
Inventors
- 👤 H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:01
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/44; C08G59/444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A LATENT CURING EPOXY RESIN COMPOSITION COMPRISING: (1) AN EPOXY RESIN HAVING AN AVERAGE OF MORE THAN ONE 1,2-EPOXY GROUP PER MOLECULE AND (2) AN AROMATIC DISULFONAMIDE; WHEREIN COMPONENTS (1) AND (2) ARE PRESENT IN QUANTITIES SO AS TO PROVIDE A SULFONAMIDE HYDROGEN EQUIVALENT: EPOXY EQUIVALENT RATIO OF AT LEAST ABOUT 0.9:1.
Claim 2
Dependent Claim
52 words
A LATENT CURING EPOXY RESIN COMPOSITION COMPRISING: (1) AN EPOXY RESIN HAVING AN AVERAGE OF MORE THAN ONE 1,2-EPOXY GROUP PER MOLECULE AND (2) AN AROMATIC DISULFONAMIDE; WHEREIN COMPONENTS (1) AND (2) ARE PRESENT IN QUANTITIES SO AS TO PROVIDE A SULFONAMIDE HYDROGEN EQUIVALENT: EPOXY EQUIVALENT RATIO OF AT LEAST ABOUT 0.9:1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |