US3640910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Advanced addition products containing terminal epoxide groups
Assignee: BASF Schweiz AG
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Filing: 1969-04-02
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Granted: 1972-02-08
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Expires: 1989-04-02
Abstract
Abstract NEW, SO-CALLED "ADVANCED" ADDUCTS CONTAINING EPOXIDE GROUPS, FROM POLYEPOXIDE COMPOUNDS CONTAINING ON AN AVERAGE MORE THAN ONE EPOXIDE GROUP IN THE MOLECULE AND MONONUCLEAR, FIVE- OR SIX-MEMBERED, UNSUBSTITUTED OR SUBSTITUTED N-HETEROCYLIC COMPOUND WHOSE MOLECULE CONTAINS TWO ENDOCYCLIC NH GROUPS, AND LESS THAN ONE EQUIVALENT NH GROUP FOR EVERY EPOXIDE GROUP EQUIPVALENT OF THE POLYEPOXIDE COMPOUND, OBTAINED BY REACTION OF FOR EXAMPLE 2 MOLS OF DIOMETHANEDIGLYCIDYL EHTER AND 1 MOL OF 5,5-DIMETHYLHYDANTOIN. THE EPOXIDE RESINS "ADVANCED" WITH THE AID OF SUCH NITROGEN COMPOUNDS HAVE A GOOD STORAGE STABLITY IN ADDITION TO EXCELLENT ELECTRICAL PROPERTIES.
Inventors
- 👤 Daniel Porret
- 👤 Juergen Habermeier
- 👤 Hans Batzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:21
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/10
Claims Analysis
Total Claims: 0
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |