Patent US4437732A successfully refreshed from Google Patents.
US3180010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing air cleaner element
Assignee: —
•
Filing: —
•
Granted: 1965-04-27
•
Expires: 1982-04-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:44
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0001; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B01D46/10; B01D46/52; B01D46/521; Y; Y10; Y10S; Y10S55/00; Y10S55/05; Y10S55/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE METHOD OF MAKING A CENTRALLY OPEN ARTICLE OF POROUS COMPRESSIBLE MATERIAL WHICH INCLUDES CUTTING A SHEET OF SAID MATERIAL TO FORM A BLANK HAVING A POLYGONAL OUTER PERIPHERY, CUTTING THE BLANK ALONG TWO INTERSECTING LINES HAVING THEIR TERMINI SPACED FROM THE OUTER PERIPHERY OF THE BLANK, THE POINT OF INTERSECTION OF SAID LINES BEING GENERALLY IN THE MIDDLE OF SAID BLANK AND SPACED FROM THE OPPOSITE ENDS OF SAID LINES, AND INVERTING THE BLANK SO THAT THE WALL SECTIONS OF THE BLANK FORMED BY SAID LINES OF CUT BECOME THE OUTER PERIPHERY OF THE FINISHED ARTICLE AND THE OUTER PERIPHERY OF THE BLANK BECOMES THE OPENING OF THE FINISHED ARTICLE.
Claim 2
Independent Claim
111 words
THE METHOD OF MAKING A CENTRALLY OPEN ARTICLE OF POROUS COMPRESSIBLE MATERIAL WHICH INCLUDES CUTTING A SHEET OF SAID MATERIAL TO FORM A BLANK HAVING A POLYGONAL OUTER PERIPHERY, CUTTING THE BLANK ALONG TWO INTERSECTING LINES HAVING THEIR TERMINI SPACED FROM THE OUTER PERIPHERY OF THE BLANK, THE POINT OF INTERSECTION OF SAID LINES BEING GENERALLY IN THE MIDDLE OF SAID BLANK AND SPACED FROM THE OPPOSITE ENDS OF SAID LINES, AND INVERTING THE BLANK SO THAT THE WALL SECTIONS OF THE BLANK FORMED BY SAID LINES OF CUT BECOME THE OUTER PERIPHERY OF THE FINISHED ARTICLE AND THE OUTER PERIPHERY OF THE BLANK BECOMES THE OPENING OF THE FINISHED ARTICLE.
References Cited (Backward Citations)
US649204A
Cited
US1487292A
Cited
US1526911A
Cited
US1743544A
Cited
US1716462A
Cited
US2558195A
Cited
US2982515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |