US3495463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filtering system and fluid filter therefor
Assignee: United States Steel Corp
•
Filing: 1967-09-25
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Granted: 1970-02-17
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Expires: 1987-09-25
Abstract
No abstract record available.
Inventors
- 👤 William E Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:54
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/4077; B; B01; B01D; B01D46/00; B01D46/10
Claims Analysis
Total Claims: 0
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US3147016A
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US3304783A
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US3307335A
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FR1490001A
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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) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |