Patent US3706542A successfully refreshed from Google Patents.
US3706542A
Expired / Lapsed
US
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Fuel gas for cutting operations
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-10-13
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Granted: 1972-12-19
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Expires: 1990-10-13
Abstract
Abstract A FUEL GAS CONTAINING LOW MOLECULAR WEIGHT HYDROCARBONS AND BEING SUBSTANTIALLY FREE OF HYDROCARBONS CONTAINING MORE THAN 4 CARBON ATOMS AND INCLUDING PROPORTIONS, ON VOLUME BASES, OF METHYL ACETYLENE AND/OR ALLENE WITHIN THE RANGE OF FROM 5 TO 39%, PROPYLENE WITHIN THE RANGE OF FROM 30 TO 90%, AND PROPANE WITHIN THE RANGE OF FROM 0 TO 30%.
Inventors
- 👤 James Harris Gilks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:59
CPC Classifications
C; C10; C10L; C10L3/00
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |