US3671383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated biaxially oriented isotactic polypropylene and uniaxially oriented ethylene-propylene-films
Assignee: Mitsubishi Chemical Corp
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Filing: 1968-11-04
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Granted: 1972-06-20
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Expires: 1988-11-04
Abstract
Abstract A HEAT-SEALABLE LAMINATED POLYPROPYLENE FILM COMPOSED OF A BIAXIALLY ORIENTED ISOTACTIC POLYPROPYLENE FILM AND AT LEAST ONE UNIAXIALLY ORIENTED ETHYLENE-PROPYLENE COPOLYMER FILM CONTAINING AT LEAST 75% BY WEIGHT PROPYLENE. A PROCESS FOR THE PRODUCTION OF SUCH A LAMINATED POLYPROPYLENE FILM. D R A W I N G
Inventors
- 👤 Rikita Sakata
- 👤 Kohei Masuda
- 👤 Masanori Takashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/10; C09J123/14; C09J123/142; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/052; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2423/00; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |