US3303156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the stereospecific polymerization of butadiene in an aqueous emulsion
Assignee: IFP Energies nouvelles
•
Filing: 1964-03-26
•
Granted: 1967-02-07
•
Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Dauby Robert
- 👤 Teyssie Philippe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:49
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
IN A PROCESS FOR THE POLYMERIZATION OF 1,3-BUTADIENE TO 1,4-TRANS-POLYYBUTADIENE IN THE PRESENCE OF A STEREOSPECIFIC CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING A SMALL QUANTITY OF 1,3-CYCLOHEXADIENCE TO THE REACTION MIXTURE.
Claim 2
Dependent Claim
31 words
IN A PROCESS FOR THE POLYMERIZATION OF 1,3-BUTADIENE TO 1,4-TRANS-POLYYBUTADIENE IN THE PRESENCE OF A STEREOSPECIFIC CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING A SMALL QUANTITY OF 1,3-CYCLOHEXADIENCE TO THE REACTION MIXTURE.
References Cited (Backward Citations)
US2976272A
Cited
GB916092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |