US4331585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-stable polypropylene compositions
Assignee: Borg Warner Corp
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Filing: 1980-05-23
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Granted: 1982-05-25
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Expires: 2000-05-23
Abstract
Abstract Light-stable polypropylene fibers containing a combination of a hindered piperidinyl compound and a pentaerythritol polyphosphite.
Inventors
- 👤 Leo L. Valdiserri
- 👤 Elyse M. Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C08K5/49; C08K5/51; C08K5/52; C08K5/527
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A light-stable polypropylene fiber composition consisting essentially of polypropylene and minor proportions sufficient to improve the light stability of said polypropylene of each of (1) either bis-(2,2,6,6-tetramethyl-4-piperidyl) sebacate or tris-(2,2,6,6-tetramethyl-4-piperidyl) nitriloacetate, and (2) a pentaerythritol polyphosphite.
Claim 2
Dependent Claim
36 words
A light-stable polypropylene fiber composition consisting essentially of polypropylene and minor proportions sufficient to improve the light stability of said polypropylene of each of (1) either bis-(2,2,6,6-tetramethyl-4-piperidyl) sebacate or tris-(2,2,6,6-tetramethyl-4-piperidyl) nitriloacetate, and (2) a pentaerythritol polyphosphite.
Claim 3
Dependent Claim
15 words
The light-stable polypropylene composition of claim 1 wherein the pentaerythritol polyphosphite is distearyl pentaerythritol diphosphite.
Claim 4
Dependent Claim
14 words
The light-stable polypropylene composition of claim 1 wherein the pentaerythritol polyphosphite is tripentaerythritol tetraphosphite.
References Cited (Backward Citations)
US3737485A
Cited
US4110306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |