US2585537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beta-methylene-beta-propiolactone copolymers
Assignee: EIDP Inc
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Filing: 1949-10-21
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Granted: 1952-02-12
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Expires: 1969-10-21
Abstract
No abstract record available.
Inventors
- 👤 Donald D Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
C; C08; C08F; C08F246/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
POLYMERIC MATERIAL COMPRISING THE COPOLYMER OF BETA-METHYLENE-BETA-PROPIOLACTONE WITH ANOTHER COPOLYMERIZABLE ORGANIC COMPOUND CONTAINING ETHYLENE UNSATURATION, SAID COPOLYMER CONTAINING LACTONE UNITS AND BEING FREE OF PYRONE RINGS.
Claim 2
Dependent Claim
26 words
POLYMERIC MATERIAL COMPRISING THE COPOLYMER OF BETA-METHYLENE-BETA-PROPIOLACTONE WITH ANOTHER COPOLYMERIZABLE ORGANIC COMPOUND CONTAINING ETHYLENE UNSATURATION, SAID COPOLYMER CONTAINING LACTONE UNITS AND BEING FREE OF PYRONE RINGS.
References Cited (Backward Citations)
US2263598A
Cited
US2487885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |