US3286009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the surface properties of polypropylene film
Assignee: Toray Industries Inc
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Filing: 1963-07-18
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Granted: 1966-11-15
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Expires: 1983-07-18
Abstract
No abstract record available.
Inventors
- 👤 Yumoto Hirosuke
- 👤 Hashimoto Takeshi
- 👤 Tanaka Shinji
- 👤 Ito Tamotsu
- 👤 Kojima Yasuhiro
- 👤 Shibata Yoshinobu
- 👤 Adachi Takuo
- 👤 Morita Yutaka
- 👤 Ebihara Tsutomu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; B; B29; B29C; B29C59/00; B29C59/005; B29C59/08; B29C67/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/044; C08J7/048; C08J7/052; B29C59/10; B29C59/16; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053; B29L; B29L2007/00; B29L2007/008; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF IMPROVING THE SURFACE PROPERTIES OF A POLYPROPYLENE FILM WHICH COMPRISE FIRST STRETCHING A POLYPROPYLENE FILM BIAXIALLY TO ORIENT SAID FILM UNTIL ITS PLANAR ORIENTATION INDEX BECOMES NOT OVER 2X10-**3 AND ITS AXIAL ORIENTATION INDEX BECOMES NOT OVER ABOUT 10X**103 AND THEREAFTER SUBJECTING THE SURFACE OF SAID FILM TO AN OXIDATION TREATMENT, SAID PLANAR ORIENTATION INDEX AND SAID AXIAL ORIENTATION INDEX DENOTES BIREFRINGENCE EXPRESSED AS 1/2(B+Y) -A IS THE MEASURE OF THE WHEREBY 1/2(B+Y) -A IS THE MEASURE OF THE PLANAR ORIENTATION OF THE FILM AND WHEREBY -B IS THE MEASURE OF THE EQUILIBRIUM OF THE LONGITUDINAL AND TRANSVERSE ORIENTATIONS WITHIN THE FILM.
Claim 2
Independent Claim
105 words
A METHOD OF IMPROVING THE SURFACE PROPERTIES OF A POLYPROPYLENE FILM WHICH COMPRISE FIRST STRETCHING A POLYPROPYLENE FILM BIAXIALLY TO ORIENT SAID FILM UNTIL ITS PLANAR ORIENTATION INDEX BECOMES NOT OVER 2X10-**3 AND ITS AXIAL ORIENTATION INDEX BECOMES NOT OVER ABOUT 10X**103 AND THEREAFTER SUBJECTING THE SURFACE OF SAID FILM TO AN OXIDATION TREATMENT, SAID PLANAR ORIENTATION INDEX AND SAID AXIAL ORIENTATION INDEX DENOTES BIREFRINGENCE EXPRESSED AS 1/2(B+Y) -A IS THE MEASURE OF THE WHEREBY 1/2(B+Y) -A IS THE MEASURE OF THE PLANAR ORIENTATION OF THE FILM AND WHEREBY -B IS THE MEASURE OF THE EQUILIBRIUM OF THE LONGITUDINAL AND TRANSVERSE ORIENTATIONS WITHIN THE FILM.
References Cited (Backward Citations)
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US3076720A
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US3112199A
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US3088844A
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US3144430A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |