US3617477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a pitch and tarry substance
Assignee: Kureha Corp
•
Filing: 1969-10-27
•
Granted: 1971-11-02
•
Expires: 1989-10-27
Abstract
Abstract A process for producing pitch and tar characterizing by introducing the raw oil, whose aromatic content is more than 80 percent, into such heat medium as inert gases such as steam heated up to 1,300* to 2,500* C. or complete combustion flame of the same temperature range produced by using fuel and air or oxygen, thus allowing it to react for 0.001 to 0.1 seconds at a temperature of 900* to 1,500* C. under a pressure 300 mm./Hg. absolute to 20 kg./cm.2 gauge.
Inventors
- 👤 Shimpei Gomi
- 👤 Takuji Hosoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:37
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/002; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C10C1/00; C10C1/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A process for producing pitch and tar suitable for a carbon material or for a blending material to tar resins characterizing by introducing the raw oIl, whose aromatic content is more than 80 percent, into such heat medium as inert gases such as steam heated up to 1,300* to 2,500* C. or complete combustion flame of the same temperature range produced by using fuel and air or oxygen, thus allowing it to react for 0.001 to 0.1 seconds at a temperature of 900* to 1,500* C. under a pressure 300 mm. Hg. absolute to 20 kg./cm2 gauge.
Claim 2
Dependent Claim
107 words
A process for producing pitch and tar suitable for a carbon material or for a blending material to tar resins characterizing by introducing the raw oil, whose aromatic content is more than 80 percent and whose H/C atomic ratio is less than 1.2, into such heat medium as inert gases such as steam heated up to 1,300* to 2,500 C. or complete combustion flame of the same temperature range produced by using fuel and air or oxygen, thus allowing it to react for 0.001 to 0.1 seconds at a temperature of 900* to 1, 500* C. under a pressure 300 mm. Hg. absolute to 20 kg./cm2 gauge.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |