US4088576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of tubular inertial filter
Assignee: Individual
•
Filing: 1976-12-13
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Granted: 1978-05-09
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Expires: 1996-12-13
Abstract
Abstract A porous isopermeable tubular inertial filter with a large pore size has a slurry of fine particles flowed through it while an effluent is withdrawn through a jacket disposed about it until a thin inner layer of pores become clogged by the fine particles. The filter is then dried and the fine particles sintered in place to provide an inertial tubular filter with a upstream inner surface having a thin layer providing a high degree of filtration supported by the larger pore tubular filter.
Inventors
- 👤 Lambert H. Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:06
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0039; B01D67/0046; B01D29/00; B01D29/11; B01D29/111; B01D29/31; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2031; B01D39/2034; B01D61/00; B01D61/14; B01D61/145; B01D69/00; B01D69/10; B01D69/108; B01D71/00; B01D71/02; B01D71/022; B01D71/0223; B01D71/02232; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F3/1109; B22F3/114; B22F7/00; B22F7/002; B01D2313/00; B01D2313/18; B01D2323/00; B01D2323/28; B01D2323/283; B22F2999/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
The method of manufacturing a tubular inertial filter comprising the steps of: (a) providing a porous iso-permeable filter containing interconnecting pores, said filter being tubular and having an upstream inner surface; (b) flowing a slurry containing at least some fine particles smaller than said pores through the tubular filter and withdrawing an effluent from a jacket disposed about said tubular filter filtering some of the slurry into the upstream surface of the filter until a layer of pores adjacent to the upstream surface is clogged by fine particles; and (c) removing and heating the filter thereby heat bonding the fine particles within the pores adjacent to the upstream surface to provide a thin layer with a higher degree of filtration.
Claim 2
Independent Claim
120 words
The method of manufacturing a tubular inertial filter comprising the steps of: (a) providing a porous iso-permeable filter containing interconnecting pores, said filter being tubular and having an upstream inner surface; (b) flowing a slurry containing at least some fine particles smaller than said pores through the tubular filter and withdrawing an effluent from a jacket disposed about said tubular filter filtering some of the slurry into the upstream surface of the filter until a layer of pores adjacent to the upstream surface is clogged by fine particles; and (c) removing and heating the filter thereby heat bonding the fine particles within the pores adjacent to the upstream surface to provide a thin layer with a higher degree of filtration.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |