US2449949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenated linear polymers and copolymers of branch-chain hexadienes
Assignee: Shell Development Co
•
Filing: 1944-09-04
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Granted: 1948-09-21
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Expires: 1964-09-04
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 John L Van Winkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:46
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1074432A
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US1062913A
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US1039741A
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US1898522A
Cited
US2093096A
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US2046257A
Cited
US2094576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |