Patent US3019903A successfully refreshed from Google Patents.
US3019903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter mechanism
Assignee: Beloit Iron Works Inc
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Filing: 1959-04-13
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Granted: 1962-02-06
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert A Daane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:08
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/26; B01D33/00; B01D33/06; B01D33/073; B01D33/27; B01D33/35; B01D33/37; B01D33/58; B01D33/62; B01D33/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |