US3591537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polyvinyl aromatic compositions
Assignee: BP PLC
•
Filing: 1968-06-05
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Granted: 1971-07-06
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Expires: 1988-06-05
Abstract
Abstract PREFORMED VINYL AROMATIC POLYMER AND RUBBER ARE DISSOLVED IN VINYL AROMATIC MONOMER. THE RESULTING BLEND IS SUSPENDED IN WATER AND POLYMERISED TO GIVE A TOUGHENED POLYVINYL AROMATIC COMPOUND SUCH AS TOUGHENED POLYSTYRENE.
Inventors
- 👤 John Mansel Squire
- 👤 Michael John Symes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |