US3738929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon extraction
Assignee: Honeywell International Inc
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Filing: 1971-03-26
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Granted: 1973-06-12
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Expires: 1991-03-26
Abstract
Abstract CONTINUOUS EXTRACTION OF HYDROCARBONS FROM ASPHALTIC OR BITUMINOUS MATERIALS, SUCH AS "TAAR SANDS," WITHIN A PRESSURISED VESSEL AT ELEVATED TEMPERATURES.
Inventors
- 👤 R Terry
- 👤 R Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:57
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/007; C10G; C10G21/00; C10G21/003; C10G31/00; C10G31/08
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |