US2754290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal polymerization of acrylonitrile, methacrylonitrile, and lower alkyl methacrylates using benzothiazolyl disulfide compounds as initiator
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-05-08
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Granted: 1956-07-10
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Expires: 1973-05-08
Abstract
No abstract record available.
Inventors
- 👤 Roland J Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:47
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A POLYMERIZATION PROCESS WHICH COMPRISES HEATING A POLYMERIZABLE MONOMER CONSISTING OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE, AND THE ALKYL METHACRYLATES WHEREIN THE ALKYL GROUP CONTAINS UP TO 10 CARBON ATOMS IN THE PRESENCE OF, AS THE SOLE POLYMERIZATION CATALYST, SMALL BUT CATALYTIC AMOUNTS OF A BENZOTHIAZOLYL DISULFIDE COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
56 words
A POLYMERIZATION PROCESS WHICH COMPRISES HEATING A POLYMERIZABLE MONOMER CONSISTING OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE, AND THE ALKYL METHACRYLATES WHEREIN THE ALKYL GROUP CONTAINS UP TO 10 CARBON ATOMS IN THE PRESENCE OF, AS THE SOLE POLYMERIZATION CATALYST, SMALL BUT CATALYTIC AMOUNTS OF A BENZOTHIAZOLYL DISULFIDE COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2380426A
Cited
US2396997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |