US2656925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion treater
Assignee: Individual
•
Filing: 1950-06-15
•
Granted: 1953-10-27
•
Expires: 1970-06-15
Abstract
No abstract record available.
Inventors
- 👤 Cecil C Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:09
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/06; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86236; Y10T137/8626
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1500286A
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US2111748A
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US2103981A
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US2167160A
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US2181687A
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US2179131A
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US2232948A
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US2319962A
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US2261057A
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US2308757A
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US2488807A
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US2520304A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |