US2813849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal polymerization of acrylonitrile, methacrylonitrile, styrene, and alkyl methacylates, using thiuram disulfides as initiators
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-11-08
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Granted: 1957-11-19
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Expires: 1975-11-08
Abstract
No abstract record available.
Inventors
- 👤 Roland J Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:53
CPC Classifications
C; C08; C08F; C08F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A POLYMERIZATION PROCESS WHICH COMPRISES HEATING A POLYMERIZABLE MONOMER CONSISTING OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE, STYRENE, AND THE ALKYL METHACRYLATES WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 10 CARBON ATOMS IN THE PRESENCE OF, AS THE SOLE POLYMERIZATION CATALYST, SMALL BUT CATALYTIC AMOUNTS OF A THIURAM DISULFIDE COMPOUND HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
59 words
A POLYMERIZATION PROCESS WHICH COMPRISES HEATING A POLYMERIZABLE MONOMER CONSISTING OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE, STYRENE, AND THE ALKYL METHACRYLATES WHEREIN THE ALKYL GROUP CONTAINS FROM 1 TO 10 CARBON ATOMS IN THE PRESENCE OF, AS THE SOLE POLYMERIZATION CATALYST, SMALL BUT CATALYTIC AMOUNTS OF A THIURAM DISULFIDE COMPOUND HAVING THE STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2385190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |