Patent US3335415A successfully refreshed from Google Patents.
US4965308A
Expired / Lapsed
US
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Polymer mixture comprising an aromatic polycarbonate, an aromatic polyester and an inorganic sulfur compound
Assignee: SABIC Global Technologies BV
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Filing: 1988-05-25
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Granted: 1990-10-23
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Expires: 2008-05-25
Abstract
Abstract The invention relates to polymer mixtures which comprise an aromatic polycarbonate and an aromatic polyester. The polymer mixtures are stabilized by the addition of a sulphurous compound.
Inventors
- 👤 Wilhelmus M. M. Roovers
- 👤 Jeroen J. Verhoeven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:52
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08K; C08K3/00; C08K3/30; C08L69/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
A polymer mixture which comprises the following constituents: A. 1-98.99% by weight of an aromatic polycarbonate, B. 98.99-1% by weight of an aromatic polyester, and C. 0.01-5% by weight of a stabiliser, characterised in that the polymer mixture comprises sulphuric acid or sulphurous acid as the stabiliser.
Claim 2
Dependent Claim
47 words
A polymer mixture which comprises the following constituents: A. 1-98.99% by weight of an aromatic polycarbonate, B. 98.99-1% by weight of an aromatic polyester, and C. 0.01-5% by weight of a stabiliser, characterised in that the polymer mixture comprises sulphuric acid or sulphurous acid as the stabiliser.
Claim 3
Dependent Claim
50 words
A polymer mixture as claimed in claim 1, wherein the mixture comprises A. 6-93.99by weight of an aromatic polycarbonate, B. 6-93.99% by weight of an aromatic polyester, and C. 0.01-5% by weight of a stabiliser, characterised in that the polymer mixture comprises sulphuric acid or sulphurous acid as the stabiliser.
Claim 4
Dependent Claim
19 words
A polymer mixture as claimed in claim 1, characterised in that the polymer mixture comprises in addition a pigment.
Claim 5
Dependent Claim
20 words
A polymer mixture as claimed in claim 2, characterised in that the polymer mixture comprises ultramarine blue as a pigment.
Claim 6
Dependent Claim
39 words
A polymer mixture as claimed in claim 1, characterised in that the polymer mixture further comprises in addition one or more additives selected from the group consisting of mold release agent, flame retardant, stabilizer, reinforcing filler, dye and filler.
Claim 7
Dependent Claim
27 words
A polymer mixture as claimed in claim 1, characterised in that the polymer mixture comprises 0.01-1% by weight of sulphuric acid or sulphurous acid as a stabiliser.
Claim 8
Dependent Claim
11 words
Articles formed from the polymer mixture as claimed in claim 1.
Claim 9
Dependent Claim
54 words
A polymer mixture which comprises the following constituents: A. 1-98.99% by weight of an aromatic polycarbonate, B. 98.99-1% by weight of an aromatic polyester, and C. 0.01-5% by weight of a stabiliser, characterised in that the polymer mixture comprises a metal bisulphite, a metal hydrogen sulphate or a metal thio sulphate as the stabiliser.
Claim 10
Dependent Claim
54 words
A polymer mixture which comprises the following constituents: A. 1-98.99% by weight of an aromatic polycarbonate, B. 98.99-1% by weight of an aromatic polyester, and C. 0.01-5% by weight of a stabiliser, characterised in that the polymer mixture comprises a metal bisulphite, a metal hydrogen sulphate or a metal thio sulphate as the stabiliser.
Claim 11
Dependent Claim
58 words
A polymer mixture as claimed in claim 8, wherein the mixture comprises A. 6-93.99% by weight of an aromatic polycarbonate, B. 6-93.99% by weight of an aromatic polyester, and C. 0.01-5% by weight of a stabiliser, characterised in that the polymer mixture comprises a metal bisulphate, a metal hydrogen sulphate or a metal thio sulphate as the stabiliser.
Claim 12
Dependent Claim
19 words
A polymer mixture as claimed in claim 8, characterised in that the polymer mixture comprises in addition a pigment.
Claim 13
Dependent Claim
20 words
A polymer mixture as claimed in claim 9, characterised in that the polymer mixture comprises ultramarine blue as a pigment.
Claim 14
Dependent Claim
39 words
A polymer mixture as claimed in claim 8, characterised in that the polymer mixture further comprises in addition one or more additives selected from the group consisting of mold release agent, flame retardant, stabilizer, reinforcing filler, dye and filler.
Claim 15
Dependent Claim
11 words
Articles formed from the polymer mixture as claimed in claim 8.
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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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |