Patent US2422371A successfully refreshed from Google Patents.
US2422371A
Expired / Lapsed
US
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Rubberlike butadiene copolymers
Assignee: Goodrich Corp
•
Filing: 1941-03-05
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Granted: 1947-06-17
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Expires: 1961-03-05
Abstract
No abstract record available.
Inventors
- 👤 Frank K Schoenfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:20
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227900A
Cited
US2161039A
Cited
GB485941A
Cited
US2256148A
Cited
US2279293A
Cited
US2235625A
Cited
US2232515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |