US2470216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for synthesizing motor fuels of high antiknock value
Assignee: Hydrocarbon Research Inc
•
Filing: 1945-06-21
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Granted: 1949-05-17
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Expires: 1965-06-21
Abstract
No abstract record available.
Inventors
- 👤 Percival C Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:59
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0485; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116081A
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US2178824A
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US2243869A
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US2234941A
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US2264427A
Cited
US2248196A
Cited
US2324172A
Cited
US2378342A
Cited
US2400075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-16 | 1952-11-15 | 1953-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-16 | 1956-11-15 | 1957-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-16 | 1960-11-15 | 1961-05-17 | $7700.00 | Window Closed / Lapsed |