US3576734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of synthetic crude oil from low temperature coal tars
Assignee: Bennett Engineering Inc
•
Filing: 1968-09-25
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Granted: 1971-04-27
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Expires: 1988-09-25
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF SYNTHETIC CRUDE OIL FROM LOW TEMPERATURE COAL TARS WHICH HAVE BEEN OBTAINED BY CAREFUL TEMPERATURE CONTROL DURING THE CARBONIZATION OF VARIOUS COOL MATERIALS, SUCH AS COAL.
Inventors
- 👤 Harold L Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:02
CPC Classifications
C; C10; C10G; C10G47/00; C10G1/00; C10G1/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |