Patent US3746281A successfully refreshed from Google Patents.
Patent US630636A successfully refreshed from Google Patents.
Patent US4603174A successfully refreshed from Google Patents.
US4603174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stretched polypropylene film
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1984-12-27
•
Granted: 1986-07-29
•
Expires: 2004-12-27
Abstract
Abstract A stretched polypropylene film having excellent see-through characteristics, which is prepared by stretching in at least one direction a polypropylene resin sheet containing 0.05 ppm to 10,000 ppm by weight of a 3-position branched alpha -olefin unit and/or a vinyl cycloalkane unit, each having at least 6 carbon atoms.
Inventors
- 👤 Tadayuki Okada
- 👤 Masahiro Kakugo
- 👤 Yoshiharu Fukui
- 👤 Kizuku Wakatsuki
- 👤 Seiichiro Ima
- 👤 Junichi Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:21
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/14; C08L23/142; C08J2323/00; C08J2323/02; C08J2323/10; C08L23/18; C08L23/20; C08L2314/00; C08L2314/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A stretched polypropylene film having excellent see-through characteristics, said film being prepared by stretching in at least one direction a polypropylene resin sheet containing 0.05 ppm to 10,000 ppm by weight of a 3-position branched α-olefin unit and/or a vinyl cycloalkane unit, each having at least 6 carbon atoms.
Claim 2
Dependent Claim
49 words
A stretched polypropylene film having excellent see-through characteristics, said film being prepared by stretching in at least one direction a polypropylene resin sheet containing 0.05 ppm to 10,000 ppm by weight of a 3-position branched α-olefin unit and/or a vinyl cycloalkane unit, each having at least 6 carbon atoms.
Claim 3
Dependent Claim
17 words
A film of claim 1, wherein said vinyl cycloalkane is vinyl cyclopentane, vinyl cyclohexane or vinyl norbornane.
Claim 4
Dependent Claim
14 words
A film of claim 1, wherein said α-olefin is 3,3-dimethylbutene-1, 3-methylpentene-1, 3-methylhexene-1, or 3,5,5-trimethylhexene-1.
Claim 5
Dependent Claim
29 words
A film of claim 1, wherein said polypropylene resin sheet contains 0.5 ppm to 5,000 ppm by weight of the 3-position branched α-olefin unit and/or the vinyl cycloalkane unit.
Claim 6
Dependent Claim
29 words
A film of claim 4, wherein said polypropylene resin sheet contains 0.5 ppm to 1,000 ppm by weight of the 3-position branched α-olefin unit and/or the vinyl cycloalkane unit.
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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |