US2776273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization of vinyl chloride and vinylidene chloride with mixed azoinorganic peroxide catalyst
Assignee: Compagnie de Saint Gobain SA
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Filing: 1952-06-02
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Granted: 1957-01-01
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Expires: 1972-06-02
Abstract
No abstract record available.
Inventors
- 👤 Antoine P Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:23
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/06; C08F4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS OF PRODUCING COPOLYMERS OF VINYL CHLORIDE AND VINYLIDIEN CHLORIDE WHICH COMPRISES FORMING AN AQUEOUS EMULSION OF VINYL CHLORIDE, VINYLIDINE CHLORIDE, AND A PLURALITY OF CATALYSTS, ONE SAID CATALYST BEING AN AZO POLYMERIZATION CATALYST AND ANOTHER SAID CATALYST AN INORGANIC PEROXIDE CATALYST.
Claim 2
Dependent Claim
43 words
A PROCESS OF PRODUCING COPOLYMERS OF VINYL CHLORIDE AND VINYLIDIEN CHLORIDE WHICH COMPRISES FORMING AN AQUEOUS EMULSION OF VINYL CHLORIDE, VINYLIDINE CHLORIDE, AND A PLURALITY OF CATALYSTS, ONE SAID CATALYST BEING AN AZO POLYMERIZATION CATALYST AND ANOTHER SAID CATALYST AN INORGANIC PEROXIDE CATALYST.
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) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |