Patent US2154773A successfully refreshed from Google Patents.
US3312352A
Expired / Lapsed
US
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Filter assembly having a support grid
Assignee: IMO Industries Inc
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Filing: 1963-12-04
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Granted: 1967-04-04
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Expires: 1983-12-04
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Shiells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:45
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/11; B01D29/114; B01D29/62; B01D29/66; B01D2201/00; B01D2201/31; B01D2201/313
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2754005A
Cited
US2765094A
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US3170873A
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US3143499A
Cited
US3155613A
Cited
US3225933A
Cited
US3244286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |