US4461806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped articles of non-fibrous carbonaceous material
Assignee: DIRECTOR-GENERAL OF AGENCY INDUSTRIAL SCIENCE & TECHNOLOGY
•
Filing: 1982-02-12
•
Granted: 1984-07-24
•
Expires: 2002-02-12
Abstract
Abstract A shaped article of a carbonaceous material characterized in that the carbonaceous material is impregnated with a borosilicate glass comprising 25 to 50 wt. % of SiO2 and 20 to 45 wt. % of B2O3 as effective components.
Inventors
- 👤 Shigeru Ikeda
- 👤 Shozi Hori
- 👤 Kiyohisa Eguchi
- 👤 Kanji Matsuo
- 👤 Hidenori Zaima
- 👤 Yoshifumi Gamada
- 👤 Teruhisa Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:37
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/30; Y10T428/31; Y10T428/315
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
42 words
A shaped article of a non-fibrous carbonaceous material wherein the non-fibrous carbonaceous material is impregnated with a borosilicate glass comprising 25 to 50 wt. % of SiO 2 and 20 to 45 wt. % of B 2 O 3 as effective components.
Claim 2
Dependent Claim
42 words
A shaped article of a non-fibrous carbonaceous material wherein the non-fibrous carbonaceous material is impregnated with a borosilicate glass comprising 25 to 50 wt. % of SiO 2 and 20 to 45 wt. % of B 2 O 3 as effective components.
Claim 3
Dependent Claim
93 words
A shaped article as defined in claim 1 wherein the borosilicate glass further comprises as a third component at least one compound selected from the group consisting of R 1 2 O wherein R 1 is one of monovalent metals including K, Na and Li, R 2 O wherein R 2 is one of bivalent metals including Ca, Ba and Mg, R 3 2 O 3 wherein R 3 is one of trivalent metals including Al, and R 4 O 2 wherein R 4 is one of tetravalent metals including Ti and Zr.
Claim 4
Dependent Claim
25 words
A shaped article as defined in claim 2 wherein the borosilicate glass contains the third component in an amount of 5 to 40 wt. %.
Claim 5
Dependent Claim
20 words
A shaped article as defined in any one of claims 1 to 3 which is used as a graphite electrode.
Claim 6
Dependent Claim
20 words
A shaped article as defined in any one of claims 1 to 3 which is used as a sliding member.
Claim 7
Dependent Claim
21 words
A shaped article as defined in any one of claims 1 to 3 which is used as a heat generating member.
Claim 8
Dependent Claim
28 words
A shaped article as defined in any one of claims 1 to 3 which is used as a machine part for use in refining or working a metal.
References Cited (Backward Citations)
DE1471436A1
Cited
DE1949830A1
Cited
US3914508A
Cited
DE2257863A1
Cited
US4337295A
Cited
US4341840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |