US3969124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon articles
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1974-02-11
•
Granted: 1976-07-13
•
Expires: 1994-02-11
Abstract
Abstract High strength shaped carbonaceous articles are prepared by combining particles of carbon, graphite and mixtures thereof that have a predetermined particle size and particle size distribution with resin binder and thereafter shaping and curing the mixture. Typically, the shaped article is pyrolyzed. Additionally, the bulk density of the articles can be increased and the porosity reduced by vapor depositing graphite in the pores of the article.
Inventors
- 👤 Wilford S. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C04B35/71; C04B35/78; C04B35/80; C04B35/83
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A process for the manufacture of low porosity, high density shaped carbonaceous articles comprising: combining carbonaceous particles of predetermined particle size and particle size distribution with a polymeric resin binder, forming the resin binder and particles into a shaped article, curing the so shaped resin binder and particles and thereafter pyrolyzing the article so shaped and cured, said carbonaceous particles being selected from the group consisting of carbon, graphite and mixtures thereof and said particles having particle sizes ranging from about 100 microns to about 0.001 microns with about 50 wt. % of the carbonaceous particles finer than 10 microns in equivalent spherical diameter.
Claim 2
Dependent Claim
104 words
A process for the manufacture of low porosity, high density shaped carbonaceous articles comprising: combining carbonaceous particles of predetermined particle size and particle size distribution with a polymeric resin binder, forming the resin binder and particles into a shaped article, curing the so shaped resin binder and particles and thereafter pyrolyzing the article so shaped and cured, said carbonaceous particles being selected from the group consisting of carbon, graphite and mixtures thereof and said particles having particle sizes ranging from about 100 microns to about 0.001 microns with about 50 wt. % of the carbonaceous particles finer than 10 microns in equivalent spherical diameter.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein 3 to 12 wt. % of the particles range in size from 0.2 microns to 0.001 microns.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the particles have equivalent spherical diameters finer than 50 microns and 45 wt. % of the particles range between about 10.0 to about 0.1 microns in diameter.
Claim 5
Dependent Claim
36 words
The process of claim 1 wherein the resin binder is a phenolic resin and is present in an amount ranging from about 20 to 25 wt. % based on the total weight of the shaped article.
Claim 6
Dependent Claim
32 words
The process of claim 1 including incorporating from about 10 to about 60 wt. % of a reinforcing material with the resin and carbonaceous particles prior to forming into a shaped article.
Claim 7
Dependent Claim
33 words
The process of claim 5 wherein the reinforcing material selected from the group consisting of graphite fibers, silicon carbide, silicon nitride and aluminum oxide whiskers, boron nitride, boron carbide fibers and mixtures thereof.
Claim 8
Dependent Claim
53 words
The method of claim 1 wherein the shaped article after being pyrolyzed is thereafter treated at temperatures in the range from about 1300°C. to 1400°C. in the presence of a gaseous mixture of N 2 , H 2 , CO, CO 2 whereby pyrolytic graphite is deposited on and in the shaped articles.
Claim 9
Independent Claim
93 words
The method of preparing a shaped, carbonaceous article comprising: a. combining carbonaceous particles with from about 20 to about 25 wt. % of a phenolic resin binder, said carbonaceous particles having equivalent spherical diameters less than about 100 microns and with from about 50 wt. % of said particles having equivalent spherical diameters finer than about 10 microns said carbonaceous particles selected from carbon, graphite and mixtures thereof; b. forming the mixture of resin and particles into a shaped article; and, c. treating the shaped article under conditions sufficient to cure the resin.
Claim 10
Independent Claim
93 words
The method of preparing a shaped, carbonaceous article comprising: a. combining carbonaceous particles with from about 20 to about 25 wt. % of a phenolic resin binder, said carbonaceous particles having equivalent spherical diameters less than about 100 microns and with from about 50 wt. % of said particles having equivalent spherical diameters finer than about 10 microns said carbonaceous particles selected from carbon, graphite and mixtures thereof; b. forming the mixture of resin and particles into a shaped article; and, c. treating the shaped article under conditions sufficient to cure the resin.
Claim 11
Dependent Claim
26 words
The process of claim 8 including the step of pyrolyzing said shaped and cured article at temperatures in the range of about 250°C. to about 1400°C.
References Cited (Backward Citations)
US3084394A
Cited
US3492382A
Cited
US3444276A
Cited
US3634569A
Cited
US3790393A
Cited
US3796616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |