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Patent US2801006A successfully refreshed from Google Patents.
US2801006A
Expired / Lapsed
US
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Combination valving arrangement for oil filter systems
Assignee: Purolator Products Inc
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Filing: 1954-01-07
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Granted: 1957-07-30
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Expires: 1974-01-07
Abstract
No abstract record available.
Inventors
- 👤 William H Hultgren
- 👤 John R Joyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:16
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/03; B; B01; B01D; B01D29/00; B01D29/11; B01D29/114; B01D29/88; B01D29/90; B01D35/00; B01D35/14; B01D35/147
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |