USRE27466E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method op manufacturing pleated filters
Assignee: —
•
Filing: 1969-09-30
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Granted: 1972-08-22
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Expires: 1989-09-30
Abstract
Abstract A METHOD OF MANUFACTURING FLAT PLEATED FILTER ELEMENTS FOR FLUID SYSTEMS INCLUDING THE STEPS OF FORMING A FLUID PERVIOUS MATERIAL SUCH AS PERFORATED METAL OR THE LIKE INTO A PLURALITY OF PLEATS, OVERLAYING THE SURFACE OF THE PERFORATED MATERIAL WITH A SHEET OF NYLON, PROVIDING RODS AT THE INSIDE OF THE BENDS TO HOLD THE NYLON AGAINST THE PERFORATED MATERIAL AND THEN MOLDING (A THERMOSETTING) FRAME AROUND THE PERIPHERY OF NYLON AND PERFORATED MEMBER TO HOLD THESE MEMBERS TOGETHER.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:51
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/48; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |