US2674376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering or screening apparatus
Assignee: Standard Oil Co
•
Filing: 1950-11-13
•
Granted: 1954-04-06
•
Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 Charles J Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:36
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/027; B01D35/0273; B01D29/00; B01D29/11; B01D29/114; B01D2201/00; B01D2201/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1998122A
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US1992472A
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US2073847A
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US2122119A
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US2378737A
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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) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |