Patent US2253601A successfully refreshed from Google Patents.
Patent US2997777A successfully refreshed from Google Patents.
US2997777A
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Metal filters
Assignee: Clevite Corp
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Filing: 1958-10-29
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Granted: 1961-08-29
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Expires: 1978-10-29
Abstract
No abstract record available.
Inventors
- 👤 Gail F Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:46
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/39; B01D29/41; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2031; B01D39/2034; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153; Y10T428/12229; Y10T428/12236; Y10T428/12243; Y10T428/12361
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AS A NEW ARTICLE OF MANUFACTURE, A PERMEABLE BODY HAVING A PERMEABILITY GREATER THAN ABOUT 1 AND LESS THAN ABOUT 45% AND CONSISTING OF SINTERED POWDER OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, HAFNIUM AND ALLOYS THEREOF, SAID POWDER HAVING A BULK DENSITY OF FROM ABOUT 1/3 TO 1/2 THE THEORETICAL DENSITY OF SAID METAL, SAID BODY BEING CHARACTERIZED BY VOID SPACES SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT ITS VOLUME, A SUFFICIENTLY HIGH PERCENTAGE OF CONTIGUOUS VOID SPACES BEING INTERCONNECTED, SO AS TO FORM CONTINUOUS PASSAGES OF MINUTE CROSS-SECTION EXTENDING THROUGH THE BODY BETWEEN OPPOSITE EXTERNAL SURFACES THEREOF, TO IMPART SAID PERMEABILITY TO THE BODY.
Claim 2
Dependent Claim
107 words
AS A NEW ARTICLE OF MANUFACTURE, A PERMEABLE BODY HAVING A PERMEABILITY GREATER THAN ABOUT 1 AND LESS THAN ABOUT 45% AND CONSISTING OF SINTERED POWDER OF A METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, HAFNIUM AND ALLOYS THEREOF, SAID POWDER HAVING A BULK DENSITY OF FROM ABOUT 1/3 TO 1/2 THE THEORETICAL DENSITY OF SAID METAL, SAID BODY BEING CHARACTERIZED BY VOID SPACES SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT ITS VOLUME, A SUFFICIENTLY HIGH PERCENTAGE OF CONTIGUOUS VOID SPACES BEING INTERCONNECTED, SO AS TO FORM CONTINUOUS PASSAGES OF MINUTE CROSS-SECTION EXTENDING THROUGH THE BODY BETWEEN OPPOSITE EXTERNAL SURFACES THEREOF, TO IMPART SAID PERMEABILITY TO THE BODY.
References Cited (Backward Citations)
US2554343A
Cited
US2721378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |