US3699090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of n-butene and 4 methyl pentene-1
Assignee: Texas Petrochemicals Corp
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Filing: 1966-12-16
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Granted: 1972-10-17
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Expires: 1986-12-16
Abstract
Abstract COPOLYMERS OF ABOUT 85 TO 99.5% N-BUTENE AND ABOUT .5 TO 15% 4-METHYL PENTENE-1 AND PROCESS OF PREPARATION USING A ZIEGLER CATALYST.
Inventors
- 👤 Roger M Nagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:44
CPC Classifications
C; C08; C08F; C08F210/00
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |