US3051685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methyl vinyl ketone terpolymers
Assignee: Monsanto Chemicals Ltd
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Filing: 1958-03-31
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Granted: 1962-08-28
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Robert J Slocombe
- 👤 George L Wesp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:14
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F16/00; C08F16/36; C08F20/00; C08F20/62; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F212/10; C08F220/10; C08F220/12; C08F220/44; C08F222/00; C08F222/10; C08F222/12; C08F222/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL INITIATED BATCH POLYMERIZATION TO A CONVERSION OF AT LEAST 20 WEIGHT PERCENT OF A MONOMERIC MIXTURE CONSISTING OF (A) A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYLTOLUENE AND VINYLXYLENE, (B) ACRYLONITRILE, AND (C) METHYL VINYL KETONE, 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 POLYMIZATION AZEOTROPE COMPOSITION OF THE PARTICULAR (A) AND ACRYLONITRILE ON THE ONE HAND AND THE PARTICULAR (A) AND METHYL VINYL KETONE ON THE OTHER HAND AS PLOTTED ON AN EQUILATERAL TRIANGULAR COORDINATE GRAPH.
Claim 2
Dependent Claim
107 words
A CLEAR TERPOLYMER PREPARED BY FREE-RADICAL INITIATED BATCH POLYMERIZATION TO A CONVERSION OF AT LEAST 20 WEIGHT PERCENT OF A MONOMERIC MIXTURE CONSISTING OF (A) A MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, VINYLTOLUENE AND VINYLXYLENE, (B) ACRYLONITRILE, AND (C) METHYL VINYL KETONE, 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 POLYMIZATION AZEOTROPE COMPOSITION OF THE PARTICULAR (A) AND ACRYLONITRILE ON THE ONE HAND AND THE PARTICULAR (A) AND METHYL VINYL KETONE ON THE OTHER HAND AS PLOTTED ON AN EQUILATERAL TRIANGULAR COORDINATE GRAPH.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |