US3453202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of coal tar
Assignee: FMC Corp
•
Filing: 1966-11-28
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Granted: 1969-07-01
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Expires: 1986-11-28
Abstract
No abstract record available.
Inventors
- 👤 Louis D Friedman
- 👤 Ralph Tracy Eddinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:33
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/007; C10G1/00; C10G1/08; C10G65/00; C10G65/02; C10G65/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR VISBREAKING COAL TAR COMPRISING HYDROGENATING THE COAL TAR AT ELEVATED PRESSURES AND TEMPERATURES IN THE PRESENCE OF AN IODINE CATALYST WHILE USING AS THE HYDROGENATING GAS A MIXTURE OF HYDROGEN AND DILUENT GAS IN A MOL PERCENT RATIO OF FROM ABOUT 25 MOL PERCENT: 75 MOL PERCENT TO ABOUT 75 MOL PERCENT; 25 MOL PERCENT AND RECOVERING THE VISBROKEN COAL TAR.
Claim 2
Dependent Claim
64 words
A PROCESS FOR VISBREAKING COAL TAR COMPRISING HYDROGENATING THE COAL TAR AT ELEVATED PRESSURES AND TEMPERATURES IN THE PRESENCE OF AN IODINE CATALYST WHILE USING AS THE HYDROGENATING GAS A MIXTURE OF HYDROGEN AND DILUENT GAS IN A MOL PERCENT RATIO OF FROM ABOUT 25 MOL PERCENT: 75 MOL PERCENT TO ABOUT 75 MOL PERCENT; 25 MOL PERCENT AND RECOVERING THE VISBROKEN COAL TAR.
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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |