Patent US2655494A successfully refreshed from Google Patents.
US2655494A
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Polymerizable acrylonitrile compositions and polymerization products thereof
Assignee: Wyeth Holdings LLC
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Filing: 1951-12-29
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Granted: 1953-10-13
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Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
- 👤 Earl W Malmberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:03
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A POLYMERIZABLE COMPOSITION COMPRISING (1) ACRYLONITRILE AND (2) A COMPOUND REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
15 words
A POLYMERIZABLE COMPOSITION COMPRISING (1) ACRYLONITRILE AND (2) A COMPOUND REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
US2544638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |