US3388802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter element support means
Assignee: Hastings Manufacturing Co
•
Filing: 1965-10-21
•
Granted: 1968-06-18
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 James W Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:52
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/30; B01D29/00; B01D29/11; B01D29/114; B01D29/50; B01D29/56; B01D29/58; B01D35/14; B01D35/147; B01D35/153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US647682A
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DE1001972B
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US2823804A
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US2864505A
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US2904186A
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US2936893A
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US2929506A
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US3243045A
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US3283902A
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US3167507A
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US3272342A
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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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |