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US2743019A
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Assignee: Purolator Products Inc
•
Filing: 1953-08-28
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Granted: 1956-04-24
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Expires: 1973-08-28
Abstract
No abstract record available.
Inventors
- 👤 Julius P Kovacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:18
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D27/00; B01D27/04; B01D27/06; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/31; B01D29/33; B01D29/44; B01D29/50; B01D29/56; B01D29/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1937415A
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US2218800A
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US2320725A
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US2220706A
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US2271054A
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US2354380A
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US2471069A
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US2627350A
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GB681379A
Cited
US2667271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |