US3154393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filter
Assignee: Fiber Bond Corp
•
Filing: 1958-04-18
•
Granted: 1964-10-27
•
Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Klein
- 👤 Jean B Durgeloh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A FILTER COMPRISING A WEB OF THERMOPLASTIC FIBERS, A FRAME OVERLAPPING THE EDGE PORTIONS OF SAID WEB, AND A STIFFENING RING HAVING PORTIONS THEREOF INTERPOSED BETWEEN SAID WEB AND OVERLAPPING PORTIONS OF SAID FRAME, SAID WEB AND FRAME BEING HEAT SEALED INTO A UNITARY STRUCTURE.
Claim 2
Dependent Claim
45 words
A FILTER COMPRISING A WEB OF THERMOPLASTIC FIBERS, A FRAME OVERLAPPING THE EDGE PORTIONS OF SAID WEB, AND A STIFFENING RING HAVING PORTIONS THEREOF INTERPOSED BETWEEN SAID WEB AND OVERLAPPING PORTIONS OF SAID FRAME, SAID WEB AND FRAME BEING HEAT SEALED INTO A UNITARY STRUCTURE.
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Cited
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Cited
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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) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |