US3787510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifunctional polymerization initiators
Assignee: Phillips Petroleum Co
•
Filing: 1971-08-20
•
Granted: 1974-01-22
•
Expires: 1991-08-20
Abstract
Abstract A MULTIFUNCTIONAL POLYMERIZATION INITIATOR PREPARED IN A TWO-STEP PROCESS BY REACTING AN ORGANOMONOLITHIUM COMPOUND WITH A POLYMERIZABLE CONJUGATED DIENE OR POLYMERIZABLE MONOVINYL-SUBSTITUTED AROMATIC COMPOUND AND THEN CONTACTING THE REACTION MIXTURE WITH A POLYVINYL AROMATIC COMPOUND.
Inventors
- 👤 R Farrar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:23
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12; C07; C07F; C07F1/00; C07F1/02; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |