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US3694418A Expired / Lapsed US ⏱️ 0.0 years remaining

Linear heat-hardenable copolymerizate

Assignee: Evonik Operations GmbH
•
Filing: 1970-04-24
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Granted: 1972-09-26
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Expires: 1990-04-24
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Abstract

Abstract This invention relates to a linear heat-hardenable copolymerizate, and to a method of treating a wood surface with a foil of the said copolymerizate, the copolymerizate having a limiting viscosity of Eta 0.7 to 3.0 (100 ml . g 1) measured in toluene at 20* C., and comprising 70 TO 94 MOLE PERCENT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE OR AT LEAST ONE MONOMER HAVING THE FORMULA IN WHICH R1 is selected from the group consisting of hydrogen and a methyl group, and R2 is an alkyl group having one to four carbon atoms, 2 TO 15 MOLE PERCENT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC ANHYDRIDE AND ITACONIC ACID ANHYDRIDE, AND 4 TO 15 MOLE PERCENT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID GLYCIDYL ESTER AND METHACRYLIC ACID GLYCIDYL ESTER.

Inventors

  • 👤 Jurgen Fock
  • 👤 Ulrich Holtschmidt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 14:49
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 19 words
A copolymerizate according to claim 1 including, in addition, not in excess of 3 mole percent of vinyl pyridine.

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) 1975-09-26 1976-03-27 1976-09-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-26 1980-03-27 1980-09-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-26 1984-03-27 1984-09-26 $7700.00 Window Closed / Lapsed

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