Patent US4525505A successfully refreshed from Google Patents.
US4525505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-resistant polyamide moulding compositions
Assignee: Bayer AG
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Filing: 1983-12-14
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Granted: 1985-06-25
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Expires: 2003-12-14
Abstract
Abstract This invention relates to flame-proved polyamide moulding compositions containing a combination of from 10 to 18%, by weight melamine and from 1 to 7% by weight of a thermoplastic polyacetal, in each case based on the moulding composition.
Inventors
- 👤 Heinz Bonten
- 👤 Werner Nielinger
- 👤 Dietrich Michael
- 👤 Heinrich Haupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:36
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
24 words
A polyamide moulding composition containing from 10 to 18%, by weight, of melamine and from 1 to 7%, by weight of a thermoplastic polyacetal.
Claim 2
Dependent Claim
24 words
A polyamide moulding composition containing from 10 to 18%, by weight, of melamine and from 1 to 7%, by weight of a thermoplastic polyacetal.
Claim 3
Dependent Claim
26 words
A composition as claimed in claim 1 containing 12 to 16%, by weight of melamine and from 3 to 5%, by weight of a thermoplastic polyacetal.
Claim 4
Dependent Claim
25 words
A composition as claimed in claim 1, wherein the polyacetal is a polyformaldehyde or a copolymer of formaldehyde and a cyclic ether or cyclic formal.
Claim 5
Dependent Claim
29 words
A composition as claimed in claim 3, wherein the copolymer is a copolymer of formaldehyde and ethylene oxide and/or epichlorohydrin or a copolymer of formaldehyde and 1,3-dioxolane or 5-phenyl-1,3-dioxolane.
Claim 6
Dependent Claim
15 words
A composition as claimed in claim 1, wherein the polyamide is polyamide-6 or polyamide 6,6.
Claim 7
Dependent Claim
16 words
A composition as claimed in claim 1 containing 10-60% by weight of filler and/or reinforcing material.
Claim 8
Dependent Claim
10 words
Moulded articles obtained of compositions as claimed in claim 1.
Claim 9
Dependent Claim
16 words
A composition as claimed in claim 1, wherein the composition is a filled or reinforced polyamide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |