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US3793248A Expired / Lapsed US ⏱️ 0.0 years remaining

Adducts,containing epoxide groups,from polyepoxide compounds and binuclear n-heterocyclic compounds

Assignee: Novartis AG
•
Filing: 1971-12-27
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Granted: 1974-02-19
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Expires: 1991-12-27
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Abstract

Abstract NEW "ADVANCED" ADDUCTS, CONTAINING EPOXIDE GROUPS, FROM (1) POLYEPOXIDE COMPOUNDS WHICH ON AN AVERAGE CONTAIN MORE THAN ONE EPOXIDE GROUP IN THE MOLECULE, AND (2) LESS THAN ONE EQUIVALENT OF NH GROUPS FOR EVERY EPOXIDE EQUIVALENT OF THE POLYEPOXIDE COMPOUND 1 OF A BINUCLEAR, FIVE OR SIX-MEMBERED, UNSUBSTITUTED OR SUBSTITUTED N-HETEROCYCLIC COMPOUND WITH AN ENDOCYCLIC NH GROUP IN EACH NUCLEUS, THE HETEROCYCLIC RINGS BEING LINKED BY A DIVALENT ALIPHATIC, CYCLO ALIPHATIC OR ARALIPHATIC RADICAL, PERFERABLY ALKYLENE RADICAL, WHICH MAY BE INTERRUPTED BY OXYGEN ATOMS,EG THE REACTION PRODUCT OF 2 MOLS OF DIOMETHANE-DIGLYCIDYL ETHER AND 1 MOL OF 1,1''METHYLENE - BIS - (5,5-DIMETHYL-HYDANTOIN). THE EPOXIDE RESINS "ADVANCED" BY MEANS OF SUCH NITROGEN COMPOUNDS HAVE A GOOD STORAGE STABILITY AND EXCELLENT ELECTRICAL PROPERTIES.

Inventors

  • 👤 D Porret
  • 👤 J Habermeier
  • 👤 H Batzer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 22:35
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/20; C07D239/22; C07D303/00; C07D303/02; C07D303/04; C07D303/12; C07D303/16; C07D303/18; C07D303/20; C07D303/24; C07D303/38; C07D303/40; C07D303/44; 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) 1977-02-18 1977-08-20 1978-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-18 1981-08-20 1982-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-18 1985-08-20 1986-02-19 $7700.00 Window Closed / Lapsed

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