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US3487930A
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US
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Filter device with tubular guide means
Assignee: Parker Hannifin Corp
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Filing: 1967-06-19
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Granted: 1970-01-06
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Expires: 1987-06-19
Abstract
No abstract record available.
Inventors
- 👤 Nils O Rosaen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:00
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/027; B01D35/14; B01D35/143; B01D35/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1072371A
Cited
US1817572A
Cited
US2605904A
Cited
US3314544A
Cited
US3368680A
Cited
US3348694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |