US2826265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter element
Assignee: Ace Glass Inc
•
Filing: 1955-04-04
•
Granted: 1958-03-11
•
Expires: 1975-04-04
Abstract
No abstract record available.
Inventors
- 👤 Woody Charles M De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:31
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; Y; Y10; Y10T; Y10T428/00; Y10T428/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A BACTERIAL FILTER ELEMENT COMPRISING A SELF-SUPPORTING DISC FORMED OF LAMINATIONS OF FIBERS OF THERMOPLASTIC MATERIAL, AT LEAST ONE OUTER LAMINA CONSITING OF A THIN PAPER-LIKE MAT OF NON-WOVEN THERMOPLASTIC FIBERS HAVING A DIAMETER NOT GREATER THAN TEN MICRONS, THE FIBERS THROUGHOUT ALL LAMINATIONS BEING COMPRESSED AND FUSED TO ADJACENT FIBERS AT THEIR JUNCTIONS OF CONTACT, TO FORM A UNIFIED POROUS MASS HAVING DIAMETERS NOT GREATER THAN SEVEN MICRONS.
Claim 2
Dependent Claim
69 words
A BACTERIAL FILTER ELEMENT COMPRISING A SELF-SUPPORTING DISC FORMED OF LAMINATIONS OF FIBERS OF THERMOPLASTIC MATERIAL, AT LEAST ONE OUTER LAMINA CONSITING OF A THIN PAPER-LIKE MAT OF NON-WOVEN THERMOPLASTIC FIBERS HAVING A DIAMETER NOT GREATER THAN TEN MICRONS, THE FIBERS THROUGHOUT ALL LAMINATIONS BEING COMPRESSED AND FUSED TO ADJACENT FIBERS AT THEIR JUNCTIONS OF CONTACT, TO FORM A UNIFIED POROUS MASS HAVING DIAMETERS NOT GREATER THAN SEVEN MICRONS.
References Cited (Backward Citations)
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Cited
US1620815A
Cited
US2355822A
Cited
US2688580A
Cited
US2692654A
Cited
US2743207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |