← Back to Patent Explorer
US3801523A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for preparing synthetic latex

Assignee: JSR Corp
•
Filing: 1971-08-18
•
Granted: 1974-04-02
•
Expires: 1991-08-18
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A SYNTHETIC LATEX IS PREPARED BY THE EMULSION POLYMERIZATION OF AN ETHYLENICALLY UNSATURATED MONOMER IN 100-300 PARTS BY WEIGHT OF AN AQUEOUS ALKALINE SOLUTION CONTAINING 2-20% BY WEIGHT OF A COPOLYMER IN THE PRESENCE OF A FREE RADICAL INHIBITOR TO FORM 100-200 PARTS BY WEIGHT OF POLYMER OF THE ETHYLENICALLY UNSATURATED MONOMER, THE COPOLYMER BEING COMPOSED OF NOT LOWER THAN 7% BY WEIGHT AND LESS THAN 20% BY WEIGHT OF AN ETHYLENICALLY UNSATURATED MONOBASIC CARBOXYLIC ACID HAVING NOT HIGHER THAN 10 CARBON ATOMS AND THE REMAINING PERCENTAGE OF A MONOMER COPOLYMERIZABLE THEREWITH, AND HAVING INTRINSIC VISCOSITY OF LESS THAN 0.2 DETERMINED IN DIMETHYL FORMAMIDE AS SOLVENT AT 25*C.

Inventors

  • 👤 E Shiratsuchi
  • 👤 E Tagami

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 12:57
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

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) 1977-04-01 1977-10-01 1978-04-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-04-01 1981-10-01 1982-04-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-04-01 1985-10-01 1986-04-02 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag