US3478885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal rotary filter assembly
Assignee: Dorr Oliver Inc
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Filing: 1967-01-10
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Granted: 1969-11-18
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Expires: 1987-01-10
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:16
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0238; B01D11/028; B01D11/0284; B01D33/00; B01D33/15; B01D33/17; B01D33/44; B01D33/46; B01D33/463; B01D33/466; B01D33/70; B01D33/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |