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US3476248A
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Suction backwash means for a low pressure,multiple element,filter assembly
Assignee: RENARD P ADAMS
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Filing: 1968-03-01
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Granted: 1969-11-04
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Expires: 1988-03-01
Abstract
No abstract record available.
Inventors
- 👤 Renard P Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:19
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/118; B01D29/50; B01D29/52; B01D29/54; B01D29/62; B01D29/66; B01D29/668; B01D2201/00; B01D2201/20; B01D2201/204; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3318452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |