Patent US4790935A successfully refreshed from Google Patents.
US3666834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oriented thermoplastic films comprising polypropylene and poly(para-tertiary-butyl-styrene)
Assignee: Mobil Oil AS
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Filing: 1970-07-29
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Granted: 1972-05-30
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Expires: 1990-07-29
Abstract
Abstract A resinous blend composition, adaptable for fabrication into an oriented film structure having improved physical properties comprising a polyolefin such as polypropylene containing incorporated therein additive amounts, on the order of from about 10 percent to about 40 percent by weight of a tertiary butyl substituted aromatic resin, such as poly(para-tertiary-butyl styrene).
Inventors
- 👤 Edward M Bullard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:08
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L25/00; C08L25/02; C08L25/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
Oriented polypropylene film containing additive amounts of from about 10 percent to about 40 percent by weight of poly(para-tertiary-butyl styrene).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |