US2444643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of butadiene-1, 3 hydrocarbons in acidic aqueous emulsion in the presence of a persulfate and aluminum chloride
Assignee: Goodrich Corp
•
Filing: 1944-04-12
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Granted: 1948-07-06
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Expires: 1964-04-12
Abstract
No abstract record available.
Inventors
- 👤 Charles F Fryling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:07
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
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US2281613A
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US2234076A
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US2305025A
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US2217632A
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US2232515A
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US2306411A
Cited
US2397146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |