US2851447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process involving three monomers
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-12-07
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Granted: 1958-09-09
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Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 George L Wesp
- 👤 Robert J Slocombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:30
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; C08F212/08; C08F212/10; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/42; C08F220/44; C08F220/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL-INTITIATED BATCH POLYMERIZATION OF A MONOMERIC MIXTURE CONSISTING OF (A) A-METHYLSTYRENE, (B) ACRLONITRILE, AND (C) A MONOMER SELECTED FROM THE GROUP CONSISTING OF METHACRYLONTRILE AND ALKYL METHACRYLATES, THE PROPORTION OF THE THREE MONOMERS IN SAID MONOMERIC MIXTURE BEING LIMITED OT THOSE IN THE AREA OF MIXTURES THAT PRODUCE CLEAR TERPOLYMERS, SAID AREA ENCOMPASSING THE LINE JOINING THE POLYMERIZATION AZEOTROPE COMPOSITION OF A-METHYLSTYRENE AND ACRYLONTRILE ON THE ONE HAND AND A-METHYLSTYRENE AND THE PARTICULAR (C) ON THE OTHER HAND AS PLOTTES ON AN EQUILATERAL TRINGULAR COORDIANTE GRAPH, BUT NOT MORE THAN 5 GRAPHICAL UNITS AWAY FROM SAI LINE IN THE DIRECTION OF INCREASING A-METHYLSTYRENE CONTENT.
Claim 2
Dependent Claim
109 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL-INTITIATED BATCH POLYMERIZATION OF A MONOMERIC MIXTURE CONSISTING OF (A) A-METHYLSTYRENE, (B) ACRLONITRILE, AND (C) A MONOMER SELECTED FROM THE GROUP CONSISTING OF METHACRYLONTRILE AND ALKYL METHACRYLATES, THE PROPORTION OF THE THREE MONOMERS IN SAID MONOMERIC MIXTURE BEING LIMITED OT THOSE IN THE AREA OF MIXTURES THAT PRODUCE CLEAR TERPOLYMERS, SAID AREA ENCOMPASSING THE LINE JOINING THE POLYMERIZATION AZEOTROPE COMPOSITION OF A-METHYLSTYRENE AND ACRYLONTRILE ON THE ONE HAND AND A-METHYLSTYRENE AND THE PARTICULAR (C) ON THE OTHER HAND AS PLOTTES ON AN EQUILATERAL TRINGULAR COORDIANTE GRAPH, BUT NOT MORE THAN 5 GRAPHICAL UNITS AWAY FROM SAI LINE IN THE DIRECTION OF INCREASING A-METHYLSTYRENE CONTENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |