US3512644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic filter backwash assembly
Assignee: Jacuzzi Brothers Inc
•
Filing: 1967-06-28
•
Granted: 1970-05-19
•
Expires: 1987-06-28
Abstract
No abstract record available.
Inventors
- 👤 Floyd M Nash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:04
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/66; B01D24/00; B01D24/46; B01D24/4631; B01D24/4642; B01D35/00; B01D35/14; B01D35/157; B01D35/1573
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2183577A
Cited
US2184177A
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US2084346A
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US2366903A
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US2451073A
Cited
US2654995A
Cited
US2537474A
Cited
US3220553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |