Patent US3537725A successfully refreshed from Google Patents.
US3537725A
Expired / Lapsed
US
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Trough-like seal for roller assembly
Assignee: CL Frost and Son Inc
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Filing: 1968-11-05
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Granted: 1970-11-03
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Expires: 1988-11-05
Abstract
No abstract record available.
Inventors
- 👤 Ruben E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:32
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C13/00; F16C13/006; F16C33/80; F16J; F16J15/00; F16J15/44; F16J15/447; F16J15/4472; F16J15/4474; F16C19/00; F16C19/02; F16C19/04; F16C19/06; F16C2326/00; F16C2326/58; F16C33/723
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA514842A
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CA569214A
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US2003000A
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US2133230A
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US2250167A
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US2770506A
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US2702868A
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US2868567A
Cited
GB924605A
Cited
US3101954A
Cited
US3093425A
Cited
US3447843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |