US4075114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible graphite material containing boric acid
Assignee: Nippon Carbon Co Ltd
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Filing: 1976-03-12
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Granted: 1978-02-21
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Expires: 1996-03-12
Abstract
Abstract A process for producing flexible graphite material comprises incorporating expanded graphite material with boric acid, compression molding the resulting mixture and, if desired, heating the resulting molding while under compression. This invention also relates to the flexible graphite material produced by the process.
Inventors
- 👤 Toshikatsu Ishikawa
- 👤 Tanaka Junichi
- 👤 Haruo Teranishi
- 👤 Shinichiro Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/536; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
A process for producing flexible graphite material comprising incorporating expanded graphite material with boric acid in amounts of 3-15 % by weight thereof, and compression molding the mixture.
Claim 2
Dependent Claim
28 words
A process for producing flexible graphite material comprising incorporating expanded graphite material with boric acid in amounts of 3-15 % by weight thereof, and compression molding the mixture.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein the compression molding is effected at 80-250 kg/cm 2 .
Claim 4
Dependent Claim
37 words
A process for producing flexible graphite material comprising incorporating expanded graphite material with boric acid in amounts of 3-15 % by weight thereof, compression molding the mixture, and heating the compression molded mixture while under compression pressure.
Claim 5
Dependent Claim
37 words
A process for producing flexible graphite material comprising incorporating expanded graphite material with boric acid in amounts of 3-15 % by weight thereof, compression molding the mixture, and heating the compression molded mixture while under compression pressure.
Claim 6
Dependent Claim
17 words
A process according to claim 3, wherein the compression molding is effected at 80-250 kg/cm 2 .
Claim 7
Dependent Claim
16 words
A process according to claim 3, wherein the heating is effected at 600° - 2,400° C.
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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |