US3468425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter element
Assignee: Purolator Courier Corp
•
Filing: 1967-02-16
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Granted: 1969-09-23
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:06
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/024; B; B01; B01D; B01D27/00; B01D27/04; B01D27/06; B01D27/10; B01D27/103; B01D27/106; B01D27/14; B01D27/142; B01D27/144; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/216; B01D29/50; B01D29/56; B01D29/58; F01; F01M; F01M1/00; F01M1/10; B01D2201/00; B01D2201/18; B01D2201/182; B01D2201/188
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) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |