US2659916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coke remover for tar and petroleum stills and the like
Assignee: C A LEWIS Inc
•
Filing: 1948-10-07
•
Granted: 1953-11-24
•
Expires: 1968-10-07
Abstract
No abstract record available.
Inventors
- 👤 Chester A Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
C; C10; C10B; C10B33/00; C10B33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US866839A
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US1113277A
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US1604896A
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US1699936A
Cited
US1835191A
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US2205757A
Cited
US2196260A
Cited
US2499929A
Cited
US2524948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |