US3687867A
Expired / Lapsed
US
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Novel co-initiator systems
Assignee: Argus Chemical Corp
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Filing: 1970-04-08
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Granted: 1972-08-29
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Expires: 1990-04-08
Abstract
Abstract THE COMBINATION OF TERTIARY ALKYL PREESTERS OF TERTIARY HYDROPEROXIDES AND EITHER ORGANIC AZO COMPOUNDS CONTAINING THE MONOVALENT-CN RADICAL OR DIACYL PEROXIDES USEFUL AS POLYMERIZATION INITIATORS. THESE CO-INITIATOR SYSTEMS ARE PATICULARLY EFFICIENT IN THE POLYMERIZATION OF CERTAIN VINYL MONOMERS SUCH AS VINYL CHLORIDE.
Inventors
- 👤 Roger N Lewis
- 👤 Ronald L Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:11
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/38; C08; C08F; C08F4/00; C08F4/28; C08F4/32
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |