US3370972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated biaxially oriented polypropylene film
Assignee: EIDP Inc
•
Filing: 1964-09-11
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Granted: 1968-02-27
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Expires: 1984-09-11
Abstract
No abstract record available.
Inventors
- 👤 Nagel Herbert
- 👤 James M Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:10
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/043; C08J7/048; C08J7/052; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2427/00; C08J2427/02; C08J2427/04; C08J2427/08; C08J2477/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/28; Y10T428/2813; Y10T428/283; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A FILM STRUCTURE COMPRISING A BIAXIALLY ORIENTED POLYPROPYLENE FILM ABOUT 0.75-2 MILS THICK HAVING ON ONE SURFACE A LAYER ABOUT 0.07-0.2 MIL THICK OF A COPOLYMER OF 60-95 PARTS BY WEIGHT OF VINYLIDENE CHLORIDE AND 5-40 PARTS BY WEIGHT OF AN ALKYL ACRYLATE WHEREIN THE ALKYL GROUP HAS 1 THROUGH 3 CARBONS AND, BASED ON THE WEIGHT OF THE COPOLYMER, 1-10% OF ACRYLIC ACID; HAVING ON SAID COPOLYMER LAYER A COATING 0.5-3.0 MILS THICK OF A POLYAMIDE HAVING A RELATIVE VISCOSITY OF AT LEAST 100 AND SELECTED FROM THE GROUP CONSISTING OF POLYHEXAMETHYLENE ADIPAMIDE, POLYHEXAMETHYLENE SEBACAMIDE AND COPOLYMERS THEREOF; AND HAVING ON THE OTHER SURFACE OF THE
Claim 2
Dependent Claim
107 words
A FILM STRUCTURE COMPRISING A BIAXIALLY ORIENTED POLYPROPYLENE FILM ABOUT 0.75-2 MILS THICK HAVING ON ONE SURFACE A LAYER ABOUT 0.07-0.2 MIL THICK OF A COPOLYMER OF 60-95 PARTS BY WEIGHT OF VINYLIDENE CHLORIDE AND 5-40 PARTS BY WEIGHT OF AN ALKYL ACRYLATE WHEREIN THE ALKYL GROUP HAS 1 THROUGH 3 CARBONS AND, BASED ON THE WEIGHT OF THE COPOLYMER, 1-10% OF ACRYLIC ACID; HAVING ON SAID COPOLYMER LAYER A COATING 0.5-3.0 MILS THICK OF A POLYAMIDE HAVING A RELATIVE VISCOSITY OF AT LEAST 100 AND SELECTED FROM THE GROUP CONSISTING OF POLYHEXAMETHYLENE ADIPAMIDE, POLYHEXAMETHYLENE SEBACAMIDE AND COPOLYMERS THEREOF; AND HAVING ON THE OTHER SURFACE OF THE
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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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |