US3640990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Termination of diene polymerization
Assignee: Phillips Petroleum Co
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Filing: 1970-06-29
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Granted: 1972-02-08
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Expires: 1990-06-29
Abstract
Abstract A METHOD FOR TERMINATING THE POLYMERIZATION OF MONOMERS, IN WHICH POLYMERIZATION THERE IS FORMED A METALTERMINATED POLYMER, WHICH INVOLVES INTRODUCING INTO THE REACTION MIXTURE A SYSTEM COMPRISED OF A OLYISOCYANATE AND A LACTONE.
Inventors
- 👤 Floyd E Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:24
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |