US2796989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and fluid treating element
Assignee: Purolator Products Inc
•
Filing: 1954-01-29
•
Granted: 1957-06-25
•
Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
- 👤 Julius P Kovacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:54
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/14; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/50; B01D29/56; B01D29/58; B01D37/00; B01D37/02; B01D37/025; Y; Y10; Y10S; Y10S210/00; Y10S210/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1728305A
Cited
US1921137A
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US2082322A
Cited
US2057414A
Cited
US2395449A
Cited
GB588991A
Cited
US2371444A
Cited
US2381354A
Cited
US2675127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |