US3261474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated filter element
Assignee: Rockwell-Standard Corp
•
Filing: 1962-05-07
•
Granted: 1966-07-19
•
Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 George F Parker
- 👤 George E Slater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:59
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/39; B01D29/41; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1901484A
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US2339703A
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US2430078A
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US2457051A
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US2591056A
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US3087623A
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US2788901A
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US2863561A
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US3007238A
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US3048276A
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FR1222727A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |