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US3455457A
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US
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Liquid filtering system for machine coolant
Assignee: FRANK J POPELAR
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Filing: 1965-11-22
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Granted: 1969-07-15
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Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Frank J Popelar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:43
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/118; B01D21/00; B01D21/0012; B01D21/0039; B01D21/0045; B01D21/009; B01D21/02; B01D21/10; B01D21/12; B01D21/24; B01D21/2405; B01D21/2427; B01D21/245; B01D21/2455; B01D21/2488; B01D21/26; B01D21/30; B01D21/302; B01D21/34; B01D35/00; B01D35/18; B01D35/22; B01D35/24; B01D29/50; B01D29/56; B01D29/58; B01D29/88; B01D29/90; B01D29/902
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) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |