US3067504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a filter sock
Assignee: Permanent Filter Corp
•
Filing: 1959-06-12
•
Granted: 1962-12-11
•
Expires: 1979-06-12
Abstract
No abstract record available.
Inventors
- 👤 Robert A Lubben
- 👤 Paul A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:37
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/23; B01D29/27; Y; Y10; Y10S; Y10S55/00; Y10S55/05; Y10S55/26; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49801
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US621937A
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US2300382A
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US1706160A
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US2076104A
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US2314640A
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US2367745A
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US2607876A
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US2746138A
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US2762667A
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US2857610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |