US3306794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a filter element
Assignee: Dana Inc
•
Filing: 1963-02-12
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Granted: 1967-02-28
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Expires: 1983-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Kingsley E Humbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:30
CPC Classifications
B; B31; B31D; B31D5/00; B31D5/0082; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/04; B01D2201/0407; Y; Y10; Y10S; Y10S55/00; Y10S55/05; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE METHOD OF FORMING A FILTER ELEMENT INTO PLEATS WITH PEAKS COMPRISING PLEATING A SHEET OF FILTER PAPER, DEPOSITING A PLURALITY OF SPACED APART SPOTS OF ADHESIVE MATERIAL LONG THE PEAKS OF SAID PLEATS, FORMING THE PLEATS INTO AN ELONGATED ANNULUS, ASSEMBLING A FORAMINOUS CENTER TUBE OF SUBSTANTIALLY THE LENGTH OF SAID ANNULUS WITH SAID ANNULUS, PLACING A FORAMINOUS BODY WRAPPER OF SUBSTANTIALLY THE LENGTH OF SAID ANNULUS AROUND THE OUTSIDE OF SAID ANNULUS IN CONTACT WITH SAID SPOTS OF ADHESIVE AND BONDING THE TWO TOGETHER, SECURING END CAPS ON THE OPPOSITE ENDS OF SAID FILTER ELEMENT, AND THUS FORMING A UNITARY THROW-AWAY TYPE FILTER ELEMENT.
Claim 2
Independent Claim
106 words
THE METHOD OF FORMING A FILTER ELEMENT INTO PLEATS WITH PEAKS COMPRISING PLEATING A SHEET OF FILTER PAPER, DEPOSITING A PLURALITY OF SPACED APART SPOTS OF ADHESIVE MATERIAL LONG THE PEAKS OF SAID PLEATS, FORMING THE PLEATS INTO AN ELONGATED ANNULUS, ASSEMBLING A FORAMINOUS CENTER TUBE OF SUBSTANTIALLY THE LENGTH OF SAID ANNULUS WITH SAID ANNULUS, PLACING A FORAMINOUS BODY WRAPPER OF SUBSTANTIALLY THE LENGTH OF SAID ANNULUS AROUND THE OUTSIDE OF SAID ANNULUS IN CONTACT WITH SAID SPOTS OF ADHESIVE AND BONDING THE TWO TOGETHER, SECURING END CAPS ON THE OPPOSITE ENDS OF SAID FILTER ELEMENT, AND THUS FORMING A UNITARY THROW-AWAY TYPE FILTER ELEMENT.
References Cited (Backward Citations)
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US2712174A
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US2915426A
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |