US4443574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition of poly(arylene sulfide), polytetrafluoroethylene and barium or calcium sulfate
Assignee: EIDP Inc
•
Filing: 1982-11-19
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Granted: 1984-04-17
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Expires: 2002-11-19
Abstract
Abstract Coating compositions of poly(arylene sulfide) and polytetrafluoroethylene have enhanced adhesion to substrates when they include barium or calcium sulfate, especially for coil coating use on cookware.
Inventors
- 👤 Jean-Louis G. Coq
- 👤 Herman E. Seymus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:01
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; C09D181/00; C09D181/02; C08; C08L; C08L81/00; C08L81/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
A coating composition comprising poly(arylene sulfide), polytetrafluoroethylene, at least one of barium and calcium sulfates and a liquid carrier, wherein the weight ratio of poly(arylene sulfide) to polytetrafluoroethylene is from 50:50 to 85:15, and the weight ratio of the sulfates to poly(arylene sulfide) plus polytetrafluoroethylene is from 10:100 to 60:100.
Claim 2
Dependent Claim
50 words
A coating composition comprising poly(arylene sulfide), polytetrafluoroethylene, at least one of barium and calcium sulfates and a liquid carrier, wherein the weight ratio of poly(arylene sulfide) to polytetrafluoroethylene is from 50:50 to 85:15, and the weight ratio of the sulfates to poly(arylene sulfide) plus polytetrafluoroethylene is from 10:100 to 60:100.
Claim 3
Dependent Claim
20 words
The coating composition of claim 1 wherein the poly(arylene sulfide) is a poly(phenylene sulfide) and the sulfate is barium sulfate.
Claim 4
Dependent Claim
18 words
The coating composition of claim 2 wherein the weight ratio of poly(phenylene sulfide) is from 60:40 to 80:20.
Claim 5
Dependent Claim
16 words
The coating composition of claim 2 wherein the weight ratio of poly(phenylene sulfide is about 70:30.
Claim 6
Dependent Claim
23 words
The coating composition of claim 2 wherein the weight ratio of barium sulfate to poly(phenylene sulfide) plus polytetrafluoroethylene is from 20:100 to 40:100.
Claim 7
Dependent Claim
21 words
The coating composition of claim 5 wherein the weight ratio of barium sulfate to poly(phenylene sulfide) plus polytetrafluoroethylene is about 30:100.
Claim 8
Dependent Claim
35 words
The coating composition of claim 2 wherein the weight ratio of poly(phenylene sulfide) is from 60:40 to 80:20, and the weight ratio of barium sulfate to poly(phenylene sulfide) plus polytetrafluoroethylene is from 20:100 to 40:100.
Claim 9
Dependent Claim
31 words
The coating composition of claim 7 wherein the weight ratio of poly(phenylene sulfide is about 70:30, and the weight ratio of barium sulfate to poly(phenylene sulfide) plus polytetrafluoroethylene is about 30:100.
Claim 10
Dependent Claim
17 words
A substrate coated with a dried and cured coating derived from the coating composition of claim 2.
Claim 11
Dependent Claim
12 words
An article of cookware comprising a coated aluminum substrate of claim 9.
Claim 12
Dependent Claim
22 words
A method of producing a coated substrate of claim 9 wherein the coating composition is applied to the substrate by coil coating.
References Cited (Backward Citations)
US4130675A
Cited
US4212922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |