Patent US3983306A successfully refreshed from Google Patents.
US3983306A
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US
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Composite sheet structures
Assignee: Bayer AG
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Filing: 1974-02-22
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Granted: 1976-09-28
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Expires: 1994-02-22
Abstract
Abstract Composite sheet structures of polyethylene and of copolyamides of ε-caprolactam, 3-aminomethyl-3,5,5-trimethyl-cyclohexylamine and isophthalic acid.
Inventors
- 👤 Werner Nielinger
- 👤 Rolf Dhein
- 👤 Ulrich Haberland
- 👤 Dietrich Michael
- 👤 Karl-Heinz Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:29
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/34; C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; B32B2250/00; B32B2250/24; B32B2307/00; B32B2307/40; B32B2307/412; B32B2323/00; B32B2323/04; B32B2377/00; Y; Y10; Y10S; Y10S206/00; Y10S206/819; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31536; Y10T428/31725; Y10T428/3175; Y10T428/31757; Y10T428/31855
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
Transparent composite sheet structures consisting essentially of at least one sheet of polyethylene directly bonded to at least one sheet of a copolyamide consisting essentially of A. 85-98% by weight of units of the formula (I) ##EQU2##and of B. 15-2% by weight of equimolar quantities of units of formulae II and III ##SPC2##
Claim 2
Dependent Claim
53 words
Transparent composite sheet structures consisting essentially of at least one sheet of polyethylene directly bonded to at least one sheet of a copolyamide consisting essentially of A. 85-98% by weight of units of the formula (I) ##EQU2##and of B. 15-2% by weight of equimolar quantities of units of formulae II and III ##SPC2##
Claim 3
Dependent Claim
26 words
Structures as claimed in claim 1 in which the copolyamide consists essentially of (A) 91-96% by weight of units of formula I and of (B) 9-4%
Claim 4
Dependent Claim
13 words
The structure of claim 1 in which the sheets are bonded after treatment
Claim 5
Dependent Claim
52 words
Transparent composite sheet structures consisting essentially of at least one sheet of polyethylene bonded to at least one sheet of a copolyamide consisting essentially of A. 85-98% by weight of units of the formula (I) ##EQU3##and of B. 15-2% by weight of equimolar quantities of units of formulae II and III ##SPC3##
Claim 6
Dependent Claim
52 words
Transparent composite sheet structures consisting essentially of at least one sheet of polyethylene bonded to at least one sheet of a copolyamide consisting essentially of A. 85-98% by weight of units of the formula (I) ##EQU3##and of B. 15-2% by weight of equimolar quantities of units of formulae II and III ##SPC3##
Claim 7
Dependent Claim
38 words
Structures as claimed in claim 4 in which the copolyamide consists essentially of (A) 91-96% by weight of units of formula I and of (B) 9-4% by weight of equimolar quantities of units of formulae II and III.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |