US3069015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Purolator Products Inc
•
Filing: 1959-12-07
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Granted: 1962-12-18
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Expires: 1979-12-07
Abstract
No abstract record available.
Inventors
- 👤 William H Hultgren
- 👤 John G Charney
- 👤 Walulik Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:14
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D27/00; B01D27/08; B01D27/10; B01D35/14; B01D35/147; B01D2201/00; B01D2201/30; B01D2201/301; Y; Y10; Y10S; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1723053A
Cited
US1792854A
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US2014445A
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US2203495A
Cited
US2110318A
Cited
US2463459A
Cited
GB702168A
Cited
US2696915A
Cited
US2888141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |