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US2471234A
Expired / Lapsed
US
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Methylpentadiene-aralkenyl copolymers
Assignee: Shell Development Co
•
Filing: 1944-06-15
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Granted: 1949-05-24
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Expires: 1964-06-15
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 Alva V Snider
- 👤 Eugene T Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:13
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE278486C
Cited
US1898522A
Cited
US1938731A
Cited
US2327705A
Cited
US2391817A
Cited
US2362052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |