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US3751399A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyacrylate resin compositions

Assignee: Lee Pharmaceuticals Inc
•
Filing: 1971-05-24
•
Granted: 1973-08-07
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Expires: 1991-05-24
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Abstract

Abstract COMPOSITIONS OF AROMATIC AND ALICYCLIC POLYACRYLATE COMPOUNDS COMPRISING FROM 25% TO 90% BY WEIGHT OF A POLYACRYLATE OF THE FORMULA: CH2=C(-R1)-COO-R-CO-C(-R1)=CH2 WHEREIN R1 IS HYDROGEN OR ALKYL OF 1 TO 4 CARBONS; AND R IS: (CH2-CH(-R2)-O)X WHEREIN X IS AN INTEGER OF 1 TO 5, AND R2 IS HYDROGEN OR AN ALKYL OF 1 TO 4 CARBON ATOMS; (B) CH2(CH2)YCH2O, WHEREIN Y IS AN INTEGER OF 1 OR 2; -CH2-CH(-OH)-CH2-O-(CH2)4-O-CH2-CH(-OH)-CH2-O-, OR -CH2-CH(-R3)-CH2-O- WHEREIN R3 IS OH OR -OOC-C(-R1)=CH2 AND R1 HAS THE SAME MEANING AS ABOVE; AND 10 TO 75% BY WEIGHT OF AN AROMATIC OR ALICYCLIC POLYACRYLATE COMPOUND ARE UTILIZED IN VARIOUS DENTAL RESTORATIVE APPLICATIONS. A PARTICULARLY SUITABLE COMPOSITION IS ONE COMPRISIJNG BIS-GMA AND TRIETHYLENE GLYCLO DIMETHACRYLATE.

Inventors

  • 👤 H Lee
  • 👤 D Stoffey

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 08:48
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/20; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S528/00; Y10S528/92

Claims Analysis

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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) 1976-08-06 1977-02-05 1977-08-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-06 1981-02-05 1981-08-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-06 1985-02-05 1985-08-07 $7700.00 Window Closed / Lapsed

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