Patent US3234639A successfully refreshed from Google Patents.
US3234639A
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Method of making a filter
Assignee: Individual
•
Filing: 1962-09-24
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Granted: 1966-02-15
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Expires: 1982-09-24
Abstract
No abstract record available.
Inventors
- 👤 Dietzsch Hans-Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:42
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; A; A01; A01K; A01K80/00; B01D29/31; B01D29/50; B01D29/52; B01D35/00; B01D39/00; B01D39/10; B01D46/00; B01D46/24; B01D46/2403; B01D46/2418; B01D46/66; B01D46/68; B01D46/681; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5227; B01D2201/00; B01D2201/46; B01D46/2451; B01D46/2455; B01D46/2474; B01D46/2482; B29C66/70; B29C66/71; B29C66/72; B29C66/725; B29C66/7252; B29C66/72523; B29L; B29L2031/00; B29L2031/14; B29L2031/60; B29L2031/601; B29L2031/602; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49787; Y10T29/49789; Y10T29/49798; Y10T29/4981
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD OF FORMING A FILTER HAVING A SMOOTH END FACE AND A LARGE NUMBER OF CLOSELY ADJAENT SUBSTANTIALLY PARALLEL CAPILLARY DUCTS HAVING END PORTIONS TAPERING TOWARD SAID END FACE, COMPRISING THE STEPS OF BUNCHING TOGETHER INTO A PACK A LARGE NUMBER OF LIKE STRUCTURAL ELEMENTS IN PARALLEL TO FORM BETWEEN SAID ELEMENTS A LARGE NUMBER OF PARALLEL CAPILLARY DUCTS, SAID ELEMENTS HAVING EACH A LENGTH CORRESPONDING TO MANY TIMES THE THICKNESS OF A FILTER WITH THE ENDS OF SAID ELEMENTS ON TOP OF SAID PACK ARRANGED SUBSTANTIALLY ALONG A COMMON SURFACE; BONDING SAID ELEMENTS TOGETHER; SUBJECTING THE SURFACE AT THE TOP OF THE PACK TO A TREATMENT FOR CONSTRICTING THE OPENINGS OF SAID CAPILLARY DUCTS; CUTTING OFF FROM THE TOP OF SAID PACK A SECTION OF A THICKNESS GREATER THAN THE LENGTH OF THE CONSTRICTED ENDS OF SAID CAPILLARY DUCTS; AND REPEATING THE AFOREMENTIONED STEPS UNTIL THE ENTIRE PACK IS CUT INTO SECTIONS FOR FORMING FILTERS.
Claim 2
Independent Claim
157 words
A METHOD OF FORMING A FILTER HAVING A SMOOTH END FACE AND A LARGE NUMBER OF CLOSELY ADJAENT SUBSTANTIALLY PARALLEL CAPILLARY DUCTS HAVING END PORTIONS TAPERING TOWARD SAID END FACE, COMPRISING THE STEPS OF BUNCHING TOGETHER INTO A PACK A LARGE NUMBER OF LIKE STRUCTURAL ELEMENTS IN PARALLEL TO FORM BETWEEN SAID ELEMENTS A LARGE NUMBER OF PARALLEL CAPILLARY DUCTS, SAID ELEMENTS HAVING EACH A LENGTH CORRESPONDING TO MANY TIMES THE THICKNESS OF A FILTER WITH THE ENDS OF SAID ELEMENTS ON TOP OF SAID PACK ARRANGED SUBSTANTIALLY ALONG A COMMON SURFACE; BONDING SAID ELEMENTS TOGETHER; SUBJECTING THE SURFACE AT THE TOP OF THE PACK TO A TREATMENT FOR CONSTRICTING THE OPENINGS OF SAID CAPILLARY DUCTS; CUTTING OFF FROM THE TOP OF SAID PACK A SECTION OF A THICKNESS GREATER THAN THE LENGTH OF THE CONSTRICTED ENDS OF SAID CAPILLARY DUCTS; AND REPEATING THE AFOREMENTIONED STEPS UNTIL THE ENTIRE PACK IS CUT INTO SECTIONS FOR FORMING FILTERS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |