US3436379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of copolymers
Assignee: BP PLC
•
Filing: 1964-08-05
•
Granted: 1969-04-01
•
Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 James Keith Hambling
- 👤 Ieuan Jenkin Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:23
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PRODUCTION OF A COPOLYMER WHICH PROCESS COMPRISES: CONTACTING FROM 70 TO 96.9 MOL PERCENT OF 4-METHYLPENTENE-1 AND FROM 0.1-20 MOL PERCENT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ISOPRENE AND BUTADIENE, WITH FROM 3-10 MOL PERCENT OF ISOBUTENE AT A TEMPERATURE IN THE RANGE 0*--120*C. IN THE PRESENCE OF 0.25-10% BY WEIGHT OF A FRIEDEL-CRAFTS CATALYST, EXPRESSED AS A PERCENTAGE BY WEIGHT OF THE TOTAL WEIGHT OF MONOMERS.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PRODUCTION OF A COPOLYMER WHICH PROCESS COMPRISES: CONTACTING FROM 70 TO 96.9 MOL PERCENT OF 4-METHYLPENTENE-1 AND FROM 0.1-20 MOL PERCENT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF ISOPRENE AND BUTADIENE, WITH FROM 3-10 MOL PERCENT OF ISOBUTENE AT A TEMPERATURE IN THE RANGE 0*--120*C. IN THE PRESENCE OF 0.25-10% BY WEIGHT OF A FRIEDEL-CRAFTS CATALYST, EXPRESSED AS A PERCENTAGE BY WEIGHT OF THE TOTAL WEIGHT OF MONOMERS.
References Cited (Backward Citations)
US3299022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |