US3589976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite films of polyolefins and polystyrene
Assignee: Hercules LLC
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Filing: 1967-03-24
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Granted: 1971-06-29
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Expires: 1987-03-24
Abstract
Abstract COMPOSITE FILM OF COEXTRUDED POLYSTYRENE AND POLYOLEFINS EXHIBITS A FAVORABLE BALANCE OF THE STIFFNESS OF POLYSTYRENE AND OTHER TENSILE PROPERTIES OF POLYOLEFINS. SURPRISINGLY, LITTLE EFFECT ON LOW TEMPERATURE IMPACT STRENGTH IS NOTED, SURFACE PROPERTIES ARE IMPROVED AS COMPARED TO THOSE OF POLYOLEFINS ALONE.
Inventors
- 👤 Louis F Erb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:28
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |