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US3733282A Expired / Lapsed US ⏱️ 0.0 years remaining

Epoxy resin mixtures containing heterocyclic systems

Assignee: Novartis AG
•
Filing: 1971-03-24
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Granted: 1973-05-15
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Expires: 1991-03-24
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Abstract

Abstract EPOXIDE RESIN MIXTURES, WHICH AT ROOM TEMPERATURE ARE STABLE TO STORAGE AND DO NOT CRYSTALLISE, OF (A) DIGLYCIDYL ETHERS OF BINUCLEAR 5-MEMBERED OR 6-MEMBERED, UNSUBSTITUTED OR SUBSTITUTED, OXYALKYLATED N-HETEROCYCLID COMPOUNDS WHICH CONTAINS TWO NH GROUPS IN THE MOLECULE FOR EXAMPLE 1,6 - BIS(1'' - GLYCIDYLOXETHYL-5'',5''-DIMETHYLHYDANTOINYL)-HEXANE, AND (B) POLYGLYCIDYL COMPOUNDS OF THE N-HETEROCYCLIC SERIES WHICH CONTAIN AT LEAST ONE HETEROCYCLIC RING, WHICH POSSESSES THE -NH-CO- GROUPING AT LEAST ONCE, WITH AT LEAST TWO GLYCIDYL GROUPS OR BMETHYLGLYCIDYL GROUPS IN THE POLYGLYCIDYL COMPOUNDS BEING LINKED DIRECTLY TO ENDOCYCLIC NITROGEN ATOMS (FOR EXAMPLE 1,3-DIGLYCIDYL-5,5-DIMETHYLHYDANTOIN).

Inventors

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

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 22:41
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/26

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) 1976-05-14 1976-11-13 1977-05-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-05-14 1980-11-13 1981-05-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-05-14 1984-11-13 1985-05-15 $7700.00 Window Closed / Lapsed

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