US3965010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal filter for melt spinning packs
Assignee: EIDP Inc
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Filing: 1975-02-04
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Granted: 1976-06-22
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Expires: 1995-02-04
Abstract
Abstract A sintered porous metal filter having upper and lower surfaces with grooves in the filter alternately in communication with the upper and lower surfaces is strengthened by filling the grooves with granular material. The filter is formed from an alloy containing 30 to 40 percent by weight chromium, about 3 percent by weight silicon, minor amounts of carbon and nitrogen and the remainder iron.
Inventors
- 👤 William Lewis Phillips, Jr.
- 👤 Ernest Alan Uebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:08
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/106; B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2031; B01D39/2034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A filter comprising a sintered porous metallic structure having upper and lower surfaces and concentric grooves alternately in communication with said upper and lower surfaces; granular material within said grooves; and means for retaining said granular material in said grooves, said sintered porous metallic structure and said granular material comprising irregularly shaped particles formed from a metal alloy consisting essentially of about 30 percent to about 40 percent by weight chromium; about 2 percent to about 4 percent by weight silicon; 100 to 400 parts per million by weight carbon and 600 to 1000 parts per million by weight nitrogen; and the remainder iron.
Claim 2
Dependent Claim
104 words
A filter comprising a sintered porous metallic structure having upper and lower surfaces and concentric grooves alternately in communication with said upper and lower surfaces; granular material within said grooves; and means for retaining said granular material in said grooves, said sintered porous metallic structure and said granular material comprising irregularly shaped particles formed from a metal alloy consisting essentially of about 30 percent to about 40 percent by weight chromium; about 2 percent to about 4 percent by weight silicon; 100 to 400 parts per million by weight carbon and 600 to 1000 parts per million by weight nitrogen; and the remainder iron.
References Cited (Backward Citations)
US2200545A
Cited
US2883261A
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US3074104A
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GB1294742A
Cited
FR2045478A5
Cited
US3876475A
Cited
US3729279A
Cited
US3788486A
Cited
US3896028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |