Patent US3030319A successfully refreshed from Google Patents.
US3030319A
Expired / Lapsed
US
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Process for polymerization of a vinylidene monomer in the presence of a cobaltic salt and an organic reducing agent
Assignee: Wyeth Holdings LLC
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Filing: 1958-10-13
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Granted: 1962-04-17
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Expires: 1978-10-13
Abstract
No abstract record available.
Inventors
- 👤 Kaizerman Samuel
- 👤 Mino Guido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:02
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F291/00; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PROCESS COMPRISING POLYMERIZING A POLYMERIZABLE MOMONERIC COMPOUND CONTAINIG A POLYMERIZABLE CH2=C< GROUP IN AN AQUEOUS MEDIUM AT A PH NOT GREATER THAN ABOUT 3.5 IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF A COBALTIC SALT OF AN INORGANIC ACID WHICH IS SOLUBLE IN AT LEAST ONE COMPONENT OF THE REACTION MEDIUM AND A NON-IONIZABLE ORGANIC REDUCING AGENT COMPRISING A CELLULOSIC MATERIAL.
References Cited (Backward Citations)
US2684357A
Cited
US2927768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |