US2851446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpol ymers
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
2026-10-30 14:52
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL-INITIATED BATCH POLYMERIZATION OF A MONOMERIC MIXTURE CONSISTING OF (A) ACRYLONTRILE, (B) A MONOMER SELECTED FROM THE GROUP CONSISTING OF A-ACETOXYSDTYRENE, A-METHYLSTYRENE, STYRENE, VINYLTOLUENE, VINYLXYLENE, 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 ACRYLONITRILE AND THE PARTICULAR (B) ON THE ONE HAND AND ACRYLONTRILE AND THE PARTICULAR (C) ON THE OTHER HAND AS PLOTTED ON AN EQUILATERAL TRINGULAR COORDINATE GRAPH.
Claim 2
Dependent Claim
100 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL-INITIATED BATCH POLYMERIZATION OF A MONOMERIC MIXTURE CONSISTING OF (A) ACRYLONTRILE, (B) A MONOMER SELECTED FROM THE GROUP CONSISTING OF A-ACETOXYSDTYRENE, A-METHYLSTYRENE, STYRENE, VINYLTOLUENE, VINYLXYLENE, 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 ACRYLONITRILE AND THE PARTICULAR (B) ON THE ONE HAND AND ACRYLONTRILE AND THE PARTICULAR (C) ON THE OTHER HAND AS PLOTTED ON AN EQUILATERAL TRINGULAR COORDINATE GRAPH.
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 |