Patent US3894983A successfully refreshed from Google Patents.
US3894983A
Expired / Lapsed
US
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Poly(arylene sulfide) coating
Assignee: SBG Labs Inc
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Filing: 1973-06-13
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Granted: 1975-07-15
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Expires: 1993-06-13
Abstract
Abstract Addition of a siliceous material having a particle size of less than 10 microns to a poly(arylene sulfide) coating formulation yields a coating with improved surface characteristics for use as a release coating in conjunction with high temperature molding, extruding, or material handling equipment.
Inventors
- 👤 David E Higbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:26
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; C; C08; C08K; C08K3/00; C08K3/34; C09; C09D; C09D181/00; C09D181/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
A COMPOSITION COMPRISING A NORMALLY SOLID POLY (ARYLENE SULFIDE) AND FROM ABOUT 0.3 PERCENT TO ABOUT 4 PERCENT BY WEIGHT BASED ON THE WEIGHT OF POLY(ARYLENE SULFIDE) OF A FINELY DIVIDED SILICEOUS MATERIAL HAVING A PARTICLE SIZE LESS THAN ABOUT 10 MICRONS.
Claim 2
Dependent Claim
42 words
A COMPOSITION COMPRISING A NORMALLY SOLID POLY (ARYLENE SULFIDE) AND FROM ABOUT 0.3 PERCENT TO ABOUT 4 PERCENT BY WEIGHT BASED ON THE WEIGHT OF POLY(ARYLENE SULFIDE) OF A FINELY DIVIDED SILICEOUS MATERIAL HAVING A PARTICLE SIZE LESS THAN ABOUT 10 MICRONS.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein said siliceous material is selected from the group consisting of silica, silicates, alumino-silicates, and combinations thereof.
Claim 4
Dependent Claim
12 words
The composition of claim 2 wherein said poly(arylene sulfide) is poly(phenylene sulfide).
Claim 5
Dependent Claim
48 words
The composition of claim 3 additionally comprising from about 0.5 percent to about 100 percent by weight titanium dioxide based on the weight of poly(phenylene sulfide) and from about 0.5 percent to about 75 percent by weight of a fluorocarbon polymer based on the weight of poly(phenylene sulfide).
Claim 6
Dependent Claim
67 words
The composition of claim 4 wherein said fluorocarbon polymer is polytetrafluoroethylene, wherein the particle size of said siliceous material is less than about 2 microns, and wherein said composition contains from about 10 to about 50 weight percent titanium dioxide, from about 5 to about 35 weight percent polytetrafluoroethylene, and from about 0.4 to about 2 weight percent siliceous material based on the weight of poly(phenylene sulfide).
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein said siliceous material is bentonite clay.
References Cited (Backward Citations)
US3622376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |