US2605256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of mercaptans in copolymerization of vinyl sulfides with acrylonitrile
Assignee: Bridgestone Firestone Inc
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Filing: 1949-06-02
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Granted: 1952-07-29
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Expires: 1969-06-02
Abstract
No abstract record available.
Inventors
- 👤 Wendell R Conard
- 👤 Chris E Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
C; C08; C08F; C08F28/00; C08F220/00; C08F220/02; C08F220/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE PROCESS WHICH COMPRISES COPOLYMERIZING ONE MOLECULAR EQUIVALENT OF AN ALKYL VINYL SULFIDE HAVING ONE TO FOUR CARBON ATOMS IN THE ALKYL GROUP, WITH ONE TO FIVE MOLECULE EQUIVALENTS OF A MONOMER OF THE CLASS CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE AND ETHACRYLONITRILE, IN THE PRESENCE OF 0.2 TO 5.0 PARTS PER HUNDREDED PARTS OF TOTAL MONOMER, OF A MERCAPTAN OF THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ARYL, FURYL, AND FURFURYL MERCAPTANS, SAID ALKYL AND CYCLOALKYL EACH CONTAINING ONE TO TWELVE CARBON ATOMS.
Claim 2
Dependent Claim
81 words
THE PROCESS WHICH COMPRISES COPOLYMERIZING ONE MOLECULAR EQUIVALENT OF AN ALKYL VINYL SULFIDE HAVING ONE TO FOUR CARBON ATOMS IN THE ALKYL GROUP, WITH ONE TO FIVE MOLECULE EQUIVALENTS OF A MONOMER OF THE CLASS CONSISTING OF ACRYLONITRILE, METHACRYLONITRILE AND ETHACRYLONITRILE, IN THE PRESENCE OF 0.2 TO 5.0 PARTS PER HUNDREDED PARTS OF TOTAL MONOMER, OF A MERCAPTAN OF THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ARYL, FURYL, AND FURFURYL MERCAPTANS, SAID ALKYL AND CYCLOALKYL EACH CONTAINING ONE TO TWELVE CARBON ATOMS.
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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |