Patent US3397787A successfully refreshed from Google Patents.
US3397787A
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US
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Horizontal table type filter elements with timing means
Assignee: Montedison SpA
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Filing: 1967-05-16
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Granted: 1968-08-20
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Expires: 1987-05-16
Abstract
No abstract record available.
Inventors
- 👤 Mini Iti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:42
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/15; B01D33/17; B01D33/19; B01D37/00; B01D37/04; C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/22; B01D33/58; B01D33/60; B01D33/70; B01D33/705; B01D33/80; B01D33/804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2687806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |