Patent US5487100A successfully refreshed from Google Patents.
Patent US2563786A successfully refreshed from Google Patents.
US2563786A
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Relief valve and signal for fluid filters
Assignee: Fram Corp
•
Filing: 1949-03-18
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Granted: 1951-08-07
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Expires: 1969-03-18
Abstract
No abstract record available.
Inventors
- 👤 William S James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:32
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1805450A
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US2145535A
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US2360020A
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US2412232A
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US2439936A
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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) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |