US3734973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifunctional polymerization initiators from diisopropenylbenzene
Assignee: Phillips Petroleum Co
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Filing: 1971-11-04
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Granted: 1973-05-22
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Expires: 1991-11-04
Abstract
Abstract HYDROCARBON SOLUBLE MULTIFUNCTIONAL POLYMERIZATION INITIATORS ARE PODUCED BY REACTING DIISOPROPENYLBENZENE COMPOUNDS WITH ORGANOMONOLITHIUM COMPOUNDS.
Inventors
- 👤 R Farrar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:27
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12; C08F36/00; C08F36/02; C08F36/04
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |