US2646885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
By-pass filter element
Assignee: Fram Corp
•
Filing: 1949-06-30
•
Granted: 1953-07-28
•
Expires: 1969-06-30
Abstract
No abstract record available.
Inventors
- 👤 William S James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/005; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2183616A
Cited
US1506967A
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US1688326A
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GB263017A
Cited
GB294706A
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US2348651A
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US2406308A
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US2412232A
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US2563786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |