US2664416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl halide polymerization with cyclic catalyst
Assignee: Monsanto Chemicals Ltd
•
Filing: 1949-11-19
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Granted: 1953-12-29
•
Expires: 1969-11-19
Abstract
No abstract record available.
Inventors
- 👤 Harold F Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:12
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A MASS POLYMERIZATION PROCESS WHICH COMPRISES POLYMERIZING A VINYL HALIDE AT 100-400* C. AND AT A PRESSURE OF 25-500 ATMOSPHERES IN CONTACT WITH FROM 0.01 TO 1.0 PART OF CYCLIC SUCCINYL PEROXIDE PER 100 PARTS OF VINYL HALIDE.
Claim 2
Dependent Claim
38 words
A MASS POLYMERIZATION PROCESS WHICH COMPRISES POLYMERIZING A VINYL HALIDE AT 100-400* C. AND AT A PRESSURE OF 25-500 ATMOSPHERES IN CONTACT WITH FROM 0.01 TO 1.0 PART OF CYCLIC SUCCINYL PEROXIDE PER 100 PARTS OF VINYL HALIDE.
References Cited (Backward Citations)
US1874107A
Cited
US2047398A
Cited
US2496390A
Cited
US2380710A
Cited
GB572767A
Cited
US2414934A
Cited
GB599429A
Cited
GB604580A
Cited
US2511480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |