US3246457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleated air filter cartridge
Assignee: Farr Co
•
Filing: 1962-04-19
•
Granted: 1966-04-19
•
Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Baun Kenneth W De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:48
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/0001; B01D46/0002; B01D46/0016; B01D46/0084; B01D46/0098; B01D46/10; F; F24; F24F; F24F13/00; F24F13/28; Y; Y10; Y10S; Y10S55/00; Y10S55/05; Y10S55/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A FILTER CARTRIDGE FOR MOUNTING IN AN AIR INLET DUCT, THE COMBINATION OF: A FRAME FOR MOUNTING IN THE AIR INLET DUCT; A PLURALITY OF SUPPORT STRIPS EACH HAVING A PAIR OF LONGITUDINAL EDGE RIBS AND A CENTRAL RIB EXTENDING GENERALLY LONGITUDINALLY THEREOF, A PLURALITY OF SUPPORT RIBS ON EACH STRIP JOINING SAID CENTRAL RIB TO SAID EDGE RIBS, SAID RIBS DEFINING RELATIVELY LARGE APERTURES THROUGH EACH OF SAID SUPPORT STRIPS, SAID APERTURES COMPRISING A SUBSTANTIAL PERCENTAGE OF THE TOTAL AREA DEFINED BY SAID SUPPORT STRIPS, EACH OF SAID SUPPORT STRIPS HAVING A V-SHAPE FOLDED ALONG SAID CENTRAL RIB, THE INTERIOR SURFACE OF EACH OF SAID V-SHAPED SUPPORT STRIPS PROVIDING FILTER MEDIA SECURING AREAS; A PLURALITY OF SPACED PROTUBER-
Claim 2
Dependent Claim
120 words
IN A FILTER CARTRIDGE FOR MOUNTING IN AN AIR INLET DUCT, THE COMBINATION OF: A FRAME FOR MOUNTING IN THE AIR INLET DUCT; A PLURALITY OF SUPPORT STRIPS EACH HAVING A PAIR OF LONGITUDINAL EDGE RIBS AND A CENTRAL RIB EXTENDING GENERALLY LONGITUDINALLY THEREOF, A PLURALITY OF SUPPORT RIBS ON EACH STRIP JOINING SAID CENTRAL RIB TO SAID EDGE RIBS, SAID RIBS DEFINING RELATIVELY LARGE APERTURES THROUGH EACH OF SAID SUPPORT STRIPS, SAID APERTURES COMPRISING A SUBSTANTIAL PERCENTAGE OF THE TOTAL AREA DEFINED BY SAID SUPPORT STRIPS, EACH OF SAID SUPPORT STRIPS HAVING A V-SHAPE FOLDED ALONG SAID CENTRAL RIB, THE INTERIOR SURFACE OF EACH OF SAID V-SHAPED SUPPORT STRIPS PROVIDING FILTER MEDIA SECURING AREAS; A PLURALITY OF SPACED PROTUBER-
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |