US2416461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts for the polymerization of butadiene-1, 3 hydrocarbons
Assignee: Goodrich Corp
•
Filing: 1943-02-13
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Granted: 1947-02-25
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Expires: 1963-02-13
Abstract
No abstract record available.
Inventors
- 👤 William D Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:48
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935733A
Cited
DE511145C
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US1953169A
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US2118863A
Cited
US2296403A
Cited
US2317858A
Cited
US2377752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-24 | 1950-08-26 | 1951-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-24 | 1954-08-26 | 1955-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-24 | 1958-08-26 | 1959-02-25 | $7700.00 | Window Closed / Lapsed |