US2533266A
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US
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Assignee: Purolator Products Inc
•
Filing: 1946-03-13
•
Granted: 1950-12-12
•
Expires: 1966-03-13
Abstract
No abstract record available.
Inventors
- 👤 Julius P Kovacs
- 👤 William H Hultgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:27
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; B01D35/153; B01D2201/00; B01D2201/29; B01D2201/291; Y; Y10; Y10S; Y10S210/00; Y10S210/17; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1780663A
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US1703335A
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US2076934A
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US2076935A
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US2203668A
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US2158512A
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US2201418A
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US2239868A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |