US4256806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smudge free graphite coated polymeric substrate and a method for preparing the same
Assignee: W.L. Gore and Associates Inc
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Filing: 1979-07-05
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Granted: 1981-03-17
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Expires: 1999-07-05
Abstract
Abstract A three component mixture of graphite, a liquid and a PTFE fine powder dispersion which has a homogeneous appearance and can be applied onto a substrate to provide a clean, glazed coating that does not easily shed graphite. Suitable substrates include: polytetrafluoroethylene filament; PTFE membrane; PTFE filament filled with graphite; polypropylene thread; polyaramide fibers.
Inventors
- 👤 Ritchie A. Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:53
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1025; C09K3/1028; B; B05; B05D; B05D5/00; B05D5/08; B05D5/083; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; D; D06; D06M; D06M11/00; D06M11/73; D06M11/74; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; D06M15/37; D06M15/643; D06M23/00; D06M23/08; D06M23/10; B05D2256/00; C09K2200/00; C09K2200/02; C09K2200/0204; C09K2200/0208; C09K2200/0278; C09K2200/0286; C09K2200/04; C09K2200/0405; C09K2200/06; C09K2200/0615; C09K2200/0635; C09K2200/0637; C09K2200/068; C09K2200/0685; C09K2200/0692; C09K2200/0695; D06M2101/00; D06M2101/16; D06M2101/18; D06M2101/20; D06M2101/22; D06M2101/30; D06M2101/34; D06M2101/36; D06M2200/00; D06M2200/40; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/30; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
68 words
A method for coating a polymeric substrate with a smudge free graphite coating comprising: (a) Dipping said polymeric substrate in a mixture which has a homogeneous appearance comprising: (1) 15-45 parts graphite; (2) 15-60 parts liquid lubricant; and (3) 25-80 parts polytetrafluoroethylene fine powder dispersion containing approximately 60% solids. (b) Applying a shearing force to the coating on said coated substrate; and (c) Drying said sheared coated substrate.
Claim 2
Independent Claim
68 words
A method for coating a polymeric substrate with a smudge free graphite coating comprising: (a) Dipping said polymeric substrate in a mixture which has a homogeneous appearance comprising: (1) 15-45 parts graphite; (2) 15-60 parts liquid lubricant; and (3) 25-80 parts polytetrafluoroethylene fine powder dispersion containing approximately 60% solids. (b) Applying a shearing force to the coating on said coated substrate; and (c) Drying said sheared coated substrate.
Claim 3
Dependent Claim
13 words
The method of claim 1 in which said liquid lubricant is silicone oil.
Claim 4
Dependent Claim
14 words
The method of claim 1 in which said liquid lubricant is a hydrocarbon solvent.
Claim 5
Dependent Claim
20 words
The method of claim 1 in which said coating step is performed by dipping said substrate in said coating composition.
Claim 6
Dependent Claim
38 words
A coated polymeric substrate including a substrate and a smudge free, even coating of a composition comprising: (a) 15-45 parts graphite; (b) 15-60 parts liquid lubricant; and (c) 25-80 parts polytetrafluoroethylene fine powder dispersion containing approximately 60% solids.
Claim 7
Dependent Claim
38 words
A coated polymeric substrate including a substrate and a smudge free, even coating of a composition comprising: (a) 15-45 parts graphite; (b) 15-60 parts liquid lubricant; and (c) 25-80 parts polytetrafluoroethylene fine powder dispersion containing approximately 60% solids.
Claim 8
Dependent Claim
15 words
The coated polymeric substrate of claim 5 in which the liquid lubricant is silicone oil.
Claim 9
Dependent Claim
16 words
The coated polymeric substrate of claim 5 in which the liquid lubricant is a hydrocarbon solvent.
Claim 10
Dependent Claim
13 words
The coated polymeric substrate of claim 5 in which the substrate is polytetrafluoroethylene.
Claim 11
Dependent Claim
14 words
The coated polymeric substrate of claim 5 in which the substrate is expanded polytetrafluoroethylene.
Claim 12
Dependent Claim
13 words
The coated polymeric substrate of claim 5 in which the substrate is polypropylene.
Claim 13
Dependent Claim
13 words
The coated polymeric substrate of claim 5 in which the substrate is polyamide.
Claim 14
Dependent Claim
13 words
The coated polymeric substrate of claim 5 in which the substrate is polyarimide.
Claim 15
Dependent Claim
56 words
A process for manufacturing a packing material comprising: (a) coating a plurality of polymeric substrates with a smudge-free, even coating of composition of (i) 14-45 parts graphite; (ii) 15-60 parts liquid lubricant; and (ii) 25-80 parts polytetrafluoroethylene fine powder dispersion containing approximately 60% solids; and (b) braiding said polymeric substrates together to form a packing material.
Claim 16
Dependent Claim
56 words
A process for manufacturing a packing material comprising: (a) coating a plurality of polymeric substrates with a smudge-free, even coating of composition of (i) 14-45 parts graphite; (ii) 15-60 parts liquid lubricant; and (ii) 25-80 parts polytetrafluoroethylene fine powder dispersion containing approximately 60% solids; and (b) braiding said polymeric substrates together to form a packing material.
Claim 17
Dependent Claim
13 words
The process of claim 13 in which said plurality of substrates are fibers.
Claim 18
Dependent Claim
10 words
A product produced according to the process of claim 13.
Claim 19
Dependent Claim
10 words
A product produced according to the process of claim 14.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |