US3558534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding expandable alkenyl aromatic polymer beads
Assignee: Huntsman Chemical Corp
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Filing: 1969-03-21
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Granted: 1971-01-26
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Expires: 1989-03-21
Abstract
Abstract EXPANDABLE ALKENYL AROMATIC POLYMERS WHICH DO NOT ACQUIRE OR RETAIN A STATIC CHARGE ARE PREPARED BY INCORPORATING A SMALL AMOUNT OF RUBBERY POLYMER INTO THE EXPANDABLE PLYMER.
Inventors
- 👤 Michal Niechwiadowicz
- 👤 Arnold B Finestone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/16; C08J9/20
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |