US3058593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two flow rate filter
Assignee: Purolator Products Inc
•
Filing: 1960-03-01
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Granted: 1962-10-16
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Expires: 1980-03-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Gruner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:55
CPC Classifications
B; B31; B31D; B31D5/00; B31D5/0082; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D39/00; B01D39/08; B01D2201/00; B01D2201/18; B01D2201/188; B01D2239/00; B01D2239/04; B01D2239/0464
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2321985A
Cited
US2395449A
Cited
US2569243A
Cited
US2675127A
Cited
GB725066A
Cited
US2801009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |