Patent US2847398A successfully refreshed from Google Patents.
US2847398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylene carbonate-ethylene copolymer and method of producing same
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-05-18
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Granted: 1958-08-12
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Expires: 1973-05-18
Abstract
No abstract record available.
Inventors
- 👤 Earl W Gluesenkamp
- 👤 John D Calfee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:14
CPC Classifications
C; C08; C08F; C08F234/00; C08F234/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS WHICH COMPRISES SUBJECTING A MONOMERIC ETYLENE AND A MINOR PROPORTION BY WEIGHT OF VINYLENE CARBONATE TO COPOLYMERIZARION AT A PRESSURE OF AT LEAST 15,000 POUNDS PER SQUIRE INCH AND A TEMPERATURE WITHIN THE RANGE OF 50*C. TO 100*C.
Claim 2
Dependent Claim
40 words
A PROCESS WHICH COMPRISES SUBJECTING A MONOMERIC ETYLENE AND A MINOR PROPORTION BY WEIGHT OF VINYLENE CARBONATE TO COPOLYMERIZARION AT A PRESSURE OF AT LEAST 15,000 POUNDS PER SQUIRE INCH AND A TEMPERATURE WITHIN THE RANGE OF 50*C. TO 100*C.
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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |