US2851444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clear terpolymers
Assignee: Monsanto Chemicals Ltd
•
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
2026-10-25 23:44
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F220/00; C08F220/02; C08F220/04; C08F220/06; Y; Y10; Y10S; Y10S526/00; Y10S526/937
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL-INTIIATED BATCH POLYMERIZATION OF A MONOMERIC MIXTURE CONSISTING OF (A) A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYLTOLUENE, AND VINYLXYLENE, (B) A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, DIALKYL FUMARATE, METHACRYLONITRILE, MONOALKYL FUMARATE, MONOALKYL MALEATE, AND (C) A DIFFERENT MONOMER SELECTED FROM SAID GROUP, THE PROPORTIONS OF THE THREE MONOMERS IN SAID MONOMERIC MIXTURE BEING LIMITED TO THOSE IN THE AREA OF MIXTURES THAT PRODUCE CLEAR TERPOLYMERS, SAID AREA ENCOMPASSING THE LINE JOINING THE POLYMERIZATION AZEOTROPE COMPOSITION OF THE PARTICULAR (A) AND THE PARTICULAR (B) ON THE ONE HAND AND THE PARTICULAR (A) AND THE PARTICULAR (C) ON THE OTHER HAND AS PLOTTED ON AN EQUILATERAL TRINGULAR COORDINATE GRAPH.
Claim 2
Dependent Claim
121 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL-INTIIATED BATCH POLYMERIZATION OF A MONOMERIC MIXTURE CONSISTING OF (A) A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYLTOLUENE, AND VINYLXYLENE, (B) A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, DIALKYL FUMARATE, METHACRYLONITRILE, MONOALKYL FUMARATE, MONOALKYL MALEATE, AND (C) A DIFFERENT MONOMER SELECTED FROM SAID GROUP, THE PROPORTIONS OF THE THREE MONOMERS IN SAID MONOMERIC MIXTURE BEING LIMITED TO THOSE IN THE AREA OF MIXTURES THAT PRODUCE CLEAR TERPOLYMERS, SAID AREA ENCOMPASSING THE LINE JOINING THE POLYMERIZATION AZEOTROPE COMPOSITION OF THE PARTICULAR (A) AND THE PARTICULAR (B) ON THE ONE HAND AND THE PARTICULAR (A) AND THE PARTICULAR (C) ON THE OTHER HAND AS PLOTTED ON AN EQUILATERAL TRINGULAR COORDINATE GRAPH.
References Cited (Backward Citations)
US2486241A
Cited
US2604457A
Cited
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 |