US2401885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of butadiene-1, 3 and nu-dialkyl acrylamides
Assignee: Goodrich Corp
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Filing: 1945-04-05
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Granted: 1946-06-11
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Expires: 1965-04-05
Abstract
No abstract record available.
Inventors
- 👤 Waldo L Semon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:59
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-06-10 | 1949-12-10 | 1950-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-06-10 | 1953-12-10 | 1954-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-06-10 | 1957-12-10 | 1958-06-11 | $7700.00 | Window Closed / Lapsed |