US4265952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vermicular expanded graphite composite material
Assignee: Dow Chemical Co
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Filing: 1979-09-24
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Granted: 1981-05-05
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Expires: 1999-09-24
Abstract
Abstract The present invention relates to a vermicular expanded graphite composite material and to an improved method for preparing such material by blending vermicular expanded graphite with a corrosion resistant resin dispersed in a carrier, vaporizing the carrier, and heating the composite material to sinter the resin. Compressed forms of the composite material are useful for protecting corrosion vulnerable substrates.
Inventors
- 👤 Ronald S. Caines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:47
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1393; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/2438; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249973; Y10T428/249986; Y10T428/30; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
60 words
A vermicular expanded graphite composite material comprising from about 50 to about 97 percent by weight expanded vermicular graphite impregnated with from about 3 to about 50 percent by weight of a corrosion resistant resin having a particle size of from about 0.05 to about 0.5 micron, said resin being uniformly distributed in the pores formed between adjacent graphite particles.
Claim 2
Dependent Claim
60 words
A vermicular expanded graphite composite material comprising from about 50 to about 97 percent by weight expanded vermicular graphite impregnated with from about 3 to about 50 percent by weight of a corrosion resistant resin having a particle size of from about 0.05 to about 0.5 micron, said resin being uniformly distributed in the pores formed between adjacent graphite particles.
Claim 3
Dependent Claim
14 words
A conduit having the interior surface thereof lined with the composition of claim 1.
Claim 4
Dependent Claim
58 words
A vermicular expanded graphite composite material comprising from about 50 to about 97 percent by weight expanded vermicular graphite impregnated with from about 3 to about 50 percent by weight of a corrosion resistant resin having a particle size of from about 0.05 to about 0.5 micron, said resin particles being homogeneously dispersed throughout the vermicular expanded graphite.
Claim 5
Dependent Claim
58 words
A vermicular expanded graphite composite material comprising from about 50 to about 97 percent by weight expanded vermicular graphite impregnated with from about 3 to about 50 percent by weight of a corrosion resistant resin having a particle size of from about 0.05 to about 0.5 micron, said resin particles being homogeneously dispersed throughout the vermicular expanded graphite.
Claim 6
Dependent Claim
13 words
The vermicular expanded graphite composite of claim 3 wherein the resin is polytetrafluoroethylene.
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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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |