US3360131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter with polyurethane foam element
Assignee: Individual
•
Filing: 1964-06-15
•
Granted: 1967-12-26
•
Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Henry J Witkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:18
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1669; B01D39/1676
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A FILTER COMPRISING A GENERALLY CYLINDRICAL OPEN CUP LIKE MEMBER WITH A REMOVABLE TOP THEREON, SAID CUP LIKE MEMBER HAVING AN OUTLET OPENING IN THE BOTTOM AND AN INLET OPENING IN THE TOP THEREOF, A BASE MADE OF A DISK LIKE MEMBER HAVING OUTER EDGES SEALINGLY ENGAGING THE OUTER PERIPHERY OF THE BOTTOM OF SAID CUP LIKE MEMBER, A FILTER ELEMENT MADE OF AN ORGANIC FOAM MATERIAL BONDED TO SAID BASE AND SPACED INWARDLY FROM THE
Claim 2
Dependent Claim
76 words
A FILTER COMPRISING A GENERALLY CYLINDRICAL OPEN CUP LIKE MEMBER WITH A REMOVABLE TOP THEREON, SAID CUP LIKE MEMBER HAVING AN OUTLET OPENING IN THE BOTTOM AND AN INLET OPENING IN THE TOP THEREOF, A BASE MADE OF A DISK LIKE MEMBER HAVING OUTER EDGES SEALINGLY ENGAGING THE OUTER PERIPHERY OF THE BOTTOM OF SAID CUP LIKE MEMBER, A FILTER ELEMENT MADE OF AN ORGANIC FOAM MATERIAL BONDED TO SAID BASE AND SPACED INWARDLY FROM THE
References Cited (Backward Citations)
US645238A
Cited
US2739916A
Cited
FR1143840A
Cited
GB858127A
Cited
US2962121A
Cited
FR1292357A
Cited
US3108866A
Cited
US3186552A
Cited
US3238707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |