US3819569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyamides stabilized with nickelous carbonate
Assignee: EIDP Inc
•
Filing: 1973-06-28
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Granted: 1974-06-25
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Expires: 1993-06-28
Abstract
Abstract A composition comprising an aromatic polyamide and nickelous carbonate, which inhibits degradative oxidation of the polyamide. The composition may be shaped, i.e., formed in a fiber, a film, or paper, or the like.
Inventors
- 👤 B Baird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:45
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/66; C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; D21H13/00; D21H13/10; D21H13/20; D21H13/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
14 words
The composition of claim 1 wherein the polyamide is poly(m-phenylene isophthalamide) or poly(p-phenylene terephthalamide).
Claim 2
Dependent Claim
26 words
The composition of claim 1 wherein the amount of nickelous carbonate is between about 2 and about 5 percent, based on the weight of the polyamide.
Claim 3
Dependent Claim
26 words
The composition of claim 2 wherein the amount of nickelous carbonate is between about 2 and about 5 percent, based on the weight of the polyamide.
Claim 4
Dependent Claim
12 words
The composition of claim 4 wherein the aromatic polyamide is wholly aromatic.
Claim 5
Dependent Claim
9 words
The composition of claim 1 in the fibrid form.
Claim 6
Dependent Claim
8 words
The composition of claim 1 in fiber form.
Claim 7
Dependent Claim
8 words
A paper comprising the Composition of claim 1.
Claim 8
Dependent Claim
8 words
A fabric comprising the composition of claim 1.
Claim 9
Dependent Claim
8 words
A paper comprising the composition of claim 2.
Claim 10
Dependent Claim
8 words
A fabric comprising the composition of claim 2.
Claim 11
Dependent Claim
11 words
The paper of claim 10 wherein the polyamide is poly(m-phenylene isophthalamide).
References Cited (Backward Citations)
US2665265A
Cited
US2913348A
Cited
US3459703A
Cited
US3640761A
Cited
GB1280734A
Cited
US3636023A
Cited
US3616200A
Cited
US3755249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |