US3762986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide composite film
Assignee: Honeywell International Inc
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Filing: 1971-02-26
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Granted: 1973-10-02
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Expires: 1991-02-26
Abstract
Abstract Composite films comprising at least one polyamide having a melting point above about 200* C having affixed to at least one of its surfaces a polyamide having a melting point below about 200* C and a moisture permeability below about 10 grams/100 in2/24 hr. per mil thickness are provided which exhibit an excellent balance of properties including high strength, clarity and low moisture and gas permeability.
Inventors
- 👤 M Bhuta
- 👤 W Sacks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/02; B32B7/027; B32B27/00; B32B27/06; B32B27/08; B32B27/34; B32B2307/00; B32B2307/50; B32B2307/54; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7246; B32B2439/00; Y; Y10; Y10S; Y10S138/00; Y10S138/07; Y10S273/00; Y10S273/06; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31728
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
27 words
A composite film as claimed in claim 1 wherein said polyamide A) has a melting point within the range of about 210* C to about 300* C.
Claim 2
Dependent Claim
23 words
A composite film as claimed in claim 2 wherein said polyamide A) is selected from the group consisting of polycaproamide and polyhexamethylene adipamide.
Claim 3
Dependent Claim
27 words
A composite film as claimed in claim 1 wherein said polyamide B) has a melting point within the range of about 150* C to about 195* C.
Claim 4
Dependent Claim
22 words
A composite film as claimed in claim 4 wherein said polyamide B) is selected from the group consisting of poly-11-undecanoamide and poly-12-dodecanoamide.
Claim 5
Dependent Claim
31 words
A composite film comprising a layer of polycaproamide having affixed to at least one of its surfaces a layer of a polyamide selected from the group consisting of poly-12-dodecanoamide and poly-11-undecanoamide.
Claim 6
Dependent Claim
13 words
A composite film as claimed in claim 6 wherein said polyamide is poly-12-dodecanoamide.
Claim 7
Dependent Claim
13 words
A composite film as claimed in claim 6 wherein said polyamide is poly-11-undecanoamide.
Claim 8
Dependent Claim
19 words
A composite film as claimed in claim 7 wherein said poly-12-dodecanoamide is affixed to both surfaces of said polycaproamide.
Claim 9
Dependent Claim
19 words
A composite film as claimed in claim 8 wherein said poly-11-undecanoamide is affixed to both surfaces of said polycaproamide.
Claim 10
Dependent Claim
14 words
A composite film comprising poly-11-undecanoamide or poly-12-dodecanoamide having polycaproamide affixed to both surfaces thereof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |