Patent US4692480A successfully refreshed from Google Patents.
US4692480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic resin composition
Assignee: Polyplastics Co Ltd
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Filing: 1986-04-10
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Granted: 1987-09-08
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Expires: 2006-04-10
Abstract
Abstract A thermoplastic resin composition comprises a thermoplastic resin and a spherical, hollow filler having a wall thickness ratio of 2.5 to 10, defined as a ratio of an outer diameter of the filler to a wall thickness of the filler. It is useful for a light-weighed piece.
Inventors
- 👤 Katsuhiko Takahashi
- 👤 Michiyuki Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:17
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/22; C08K7/24; C08K7/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A thermoplastic resin composition which comprises a thermoplastic resin and a spherical, hollow filler wherein said filler has a wall thickness ratio of about 2.5 to about 10, said ratio defined by the ratio of the outer diameter of the filler to the wall thickness of the filler.
Claim 2
Dependent Claim
48 words
A thermoplastic resin composition which comprises a thermoplastic resin and a spherical, hollow filler wherein said filler has a wall thickness ratio of about 2.5 to about 10, said ratio defined by the ratio of the outer diameter of the filler to the wall thickness of the filler.
Claim 3
Dependent Claim
29 words
A composition as claimed in claim 1, which comprises 40 to 99 percent by weight of the thermoplastic resin and 1 to 60 percent by weight of the filler.
Claim 4
Dependent Claim
22 words
A composition as claimed in claim 1, in which said filler has a size of 500 microns or smaller on the average.
Claim 5
Dependent Claim
16 words
A composition as claimed in claim 1, in which said filler is made of glass beads.
Claim 6
Dependent Claim
22 words
A composition as claimed in claim 4, in which said glass beads have a compressive strength of 4,000 kg/cm 2 or larger.
Claim 7
Dependent Claim
20 words
A composition as claimed in claim 1, which further comprises a silane compound, an epoxy compound or a titanate compound.
Claim 8
Dependent Claim
36 words
A composition as claimed in claim 1, in which said thermoplastic resin is selected from polyacetal, polyester, polyamide, polyethylene, polypropylene, polybutene, poly-methylpentene, copolymers of olefines, polystyrene, copolymers of styrene, polycarbonate, polyphenylene oxide, fluororesin and polyvinyl chloride.
Claim 9
Dependent Claim
16 words
A composition as claimed in claim 1, in which said thermoplastic resin is polyester or polyacetal.
Claim 10
Dependent Claim
16 words
A composition as claimed in claim 1, in which said ratio ranges from 3 to 8.
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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |