US2840149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for partial combustion of gasiform hydrocarbons
Assignee: Hydrocarbon Research Inc
•
Filing: 1951-10-20
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Granted: 1958-06-24
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Expires: 1971-10-20
Abstract
No abstract record available.
Inventors
- 👤 John H Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:06
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/36; C01B3/363; F; F23; F23D; F23D14/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US131044A
Cited
US2043867A
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US2365942A
Cited
US2398884A
Cited
US2435638A
Cited
US2725933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |