US3787405A
Expired / Lapsed
US
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Diglycidyl compounds containing a n-heterocyclic ring
Assignee: Novartis AG
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Filing: 1971-11-09
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Granted: 1974-01-22
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Expires: 1991-11-09
Abstract
Abstract DIGLYCIDYL ESTERS ARE PRODUCED BY THE REACTION, IN A KNOWN MANNER, OF DICARBOXYLIC ACIDS OF MONOUCLEAR N-HETEROCYCLIC COMPOUNDS, E.G. N,N''-BIS-(B-CARBOXYETHYL)-5,5-DIMETHYLHYDANTOIN, WITH EPIHALOGENHYDRIN, E.G. WITH EPICHLOROHYDRIN. EXAMPLE: THE NEW COMPOUND 1,3-BIS(OXIRANYL-CH2-OOC-CH2-CH2-),2,4-DI(O=),5,5-DI(CH3-) IMIDAZOLIDINE THE NEW DIGLYCIDYL ESTERS CAN BE EASILY CURED WITH ALL KNOWN EPOXIDE RESIN CURING AGENTS, AND ARE SUITABLE FOR THE PRODUCTION OF MOULDED SHAPES POSSESSING GOOD MECHANICAL PROPERTIES.
Inventors
- 👤 D Porret
- 👤 W Fatzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:48
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/26; Y; Y10; Y10S; Y10S525/00; Y10S525/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |