US3146197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleated filter construction
Assignee: American Air Filter Co Inc
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Filing: 1962-01-31
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Granted: 1964-08-25
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Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 Allan R Getzin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:02
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D25/00; B01D25/22; B01D25/26; B01D46/52; B01D46/521; B01D46/523; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
APPARATUS FOR FILTERING A DIRTY FLUID STREAM COMPRISING: (A) AN OPEN-ENDED HOUSING DEFINING A FLUID PASSAGE BETWEEN SPACED, OPPOSED FLUID INLET AND FLUID OUTLET FACES, (B) FILTER MATERIAL DIPOSED IN PLEATED FORMATION ACROSS SAID FLUID PASSAGE, AND (C) SPACING MEMBERS SEPARATING THE PLEATS OF SAID FILTER MATERIAL, (D) SAID SPACING MEMBERS BEING COMPRISED OF BLANKS OF FOLDABLE MATERIAL, (E) EACH BLANK BEING DIVIDED INTO A PLURALITY OF SPACED SUBSTANTIALLY PARALLEL FOLD LINES RUNNING TRANSVERSELY THEREOF AND FOLDED IN ZIG-ZAG FASHION ALONG SAID FOLD LINES TO PROVIDE A PLURALITY OF FOLD INCREMENTS, (F) WITH AT LEAST SOME OF SAID FOLD INCREMENTS BEING SO DISPLACED RELATIVE ADJACENT FOLD INCREMENTS THAT ONE ZIG-ZAG EDGE OF SAID BLANK TRANSVERSE SAID FOLD INCREMENTS HAS A DEPTH MEASURED BETWEEN A PAIR OF STRAIGHT SUBSTANTIALLY PARALLEL MEASURING LINES DETERMINED BY EXTREME PEAKS OF SAID ZIG-ZAG EDGE SUBSTANTIALLY GREATER THAN A SIMILARLY MEASURED DEPTH OF SAID OPPOSITE EDGE OF SAID BLANK.
Claim 2
Dependent Claim
153 words
APPARATUS FOR FILTERING A DIRTY FLUID STREAM COMPRISING: (A) AN OPEN-ENDED HOUSING DEFINING A FLUID PASSAGE BETWEEN SPACED, OPPOSED FLUID INLET AND FLUID OUTLET FACES, (B) FILTER MATERIAL DIPOSED IN PLEATED FORMATION ACROSS SAID FLUID PASSAGE, AND (C) SPACING MEMBERS SEPARATING THE PLEATS OF SAID FILTER MATERIAL, (D) SAID SPACING MEMBERS BEING COMPRISED OF BLANKS OF FOLDABLE MATERIAL, (E) EACH BLANK BEING DIVIDED INTO A PLURALITY OF SPACED SUBSTANTIALLY PARALLEL FOLD LINES RUNNING TRANSVERSELY THEREOF AND FOLDED IN ZIG-ZAG FASHION ALONG SAID FOLD LINES TO PROVIDE A PLURALITY OF FOLD INCREMENTS, (F) WITH AT LEAST SOME OF SAID FOLD INCREMENTS BEING SO DISPLACED RELATIVE ADJACENT FOLD INCREMENTS THAT ONE ZIG-ZAG EDGE OF SAID BLANK TRANSVERSE SAID FOLD INCREMENTS HAS A DEPTH MEASURED BETWEEN A PAIR OF STRAIGHT SUBSTANTIALLY PARALLEL MEASURING LINES DETERMINED BY EXTREME PEAKS OF SAID ZIG-ZAG EDGE SUBSTANTIALLY GREATER THAN A SIMILARLY MEASURED DEPTH OF SAID OPPOSITE EDGE OF SAID BLANK.
References Cited (Backward Citations)
US2720937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |