Patent US2822201A successfully refreshed from Google Patents.
US2822201A
Expired / Lapsed
US
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Filter element sealing construction
Assignee: Motors Liquidation Co
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Filing: 1954-06-30
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Granted: 1958-02-04
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Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Herman A Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:25
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/213; B01D2201/00; B01D2201/34; Y; Y10; Y10S; Y10S277/00; Y10S277/918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2732077A
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US1654615A
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US2076935A
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US2131509A
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US2218800A
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US2294262A
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US2468862A
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US2576144A
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US2597770A
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US2680521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |