US3190059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pocket filter
Assignee: Cambridge Filter Corp
•
Filing: 1962-05-03
•
Granted: 1965-06-22
•
Expires: 1982-05-03
Abstract
No abstract record available.
Inventors
- 👤 Carl J Bauder
- 👤 Charles G Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:35
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D39/00; B01D39/14; B01D46/023; B01D46/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
139 words
A FILTER POCKET FOR AN AIR FILTER CARTRIDGE, SAID POCKET FORMED OF FLEXIBLE SHEET FILTER MEDIA, AND COMPOSED OF TWO FLANKS JOINED ALONG OPPOSITE SIDE EDGES AND ONE END, AND HAVING AN ELONGATED OPENING AT THE OTHER END, SAID POCKET HAVING A PLURALITY OF SUBSTANTIALLY PARALLEL SPACED FLEXIBLE CONNECTING MEANS ARRANGED IN ROWS WITHIN THE POCKET CONNECTING THE OPPOSED FLANKS OF EACH POCKET ALONG LINES EXTENDING SUBSTANTIALLY PARALLEL WITH THE SIDE EDGES OF SAID POCKETS, SAID CONNECTING MEANS BEING OF GRADUATED LENGTH FROM THE OPEN END TO SAID ONE END AND WITHIN THE POCKET PROVIDING GRADUALLY DECREASING SPACING BETWEEN FLANKS FROM THE OPEN TO THE OTHER END OF SAID POCKET WHEN INFLATED BY AIR ENTERING THE POCKETS FOR FILTRATION IN PASSING THROUGH THE FLAKES THEREOF, SAID OPENING BEING A WIDTH GREATER THAN THE LENGTH OF THE LONGEST CONNECTING MEANS.
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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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |