US3236675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-sealable, coated polypropylene films
Assignee: Montedison SpA
•
Filing: 1962-03-19
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Granted: 1966-02-22
•
Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Hermitte Franco Barbieri
- 👤 Morici Vincenzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:00
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J7/052; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; C08J2427/00; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31576; Y10T428/3158; Y10T428/31587; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A HEAT-SEALABLE BASE FILM OF POLYPROPYLENE HAVING A HIGH PERCENTAGE OF ISOTACTIC CRYSTALLINITY, SAID FILM HAVING ANCHORED THERETO A COATING CONSISTING ESSENTIALLY OF A MIXTURE OF VINYL CHLORIDE-VINYL ACETATE COPOLYMER AND A CONDENSATION PRODUCT OF TOLUENE-DIISOCYANATE WITH HEXANTRIOL, IN A RATIO OF COPOLYMER/CONDENSATION PRODUCT OF FROM 7.3:1 TO 20:1.
Claim 2
Dependent Claim
49 words
A HEAT-SEALABLE BASE FILM OF POLYPROPYLENE HAVING A HIGH PERCENTAGE OF ISOTACTIC CRYSTALLINITY, SAID FILM HAVING ANCHORED THERETO A COATING CONSISTING ESSENTIALLY OF A MIXTURE OF VINYL CHLORIDE-VINYL ACETATE COPOLYMER AND A CONDENSATION PRODUCT OF TOLUENE-DIISOCYANATE WITH HEXANTRIOL, IN A RATIO OF COPOLYMER/CONDENSATION PRODUCT OF FROM 7.3:1 TO 20:1.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |