US3372073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making a molded filter assembly
Assignee: Filters Inc
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Filing: 1966-07-15
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Granted: 1968-03-05
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Expires: 1986-07-15
Abstract
No abstract record available.
Inventors
- 👤 Mac C Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:25
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/74; B29C70/76; B29C70/766; B29C39/00; B29C39/02; B29C39/10; B29C70/84; B29L; B29L2031/00; B29L2031/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METHOD OF SECURING A MOLDED PLASTIC RESIN END CAP WITH THREADS AND A RING GASKET FORMED INTEGRAL THEREWITH TO A FILTER CARTRIDGE COMPRISING: TAKING A MOLD DIE MEMBER WITH AN ANNULAR CAVITY HAVING AN ENLARGED ANNULAR UPPER SECTION, AN ANNULAR TAPERED SECTION THEREBLOW TERMINATING IN A NARROW ANNULAR SECTION FORMING THE BOTTOM OF THE CAVITY, WITH THREADS ON THE INNER SURFACE OF THE CAVITY ADJACENT THE TAPERED SECTION, AND A HORIZONTAL ANNULAR SHOULDER SECTION IN THE CAVITY ABOVE THE THREADED FORMATION TO FORM A GASKET SEAT; PLACING A RING GASKET ON THE HORIZONTAL SHOULDER SECTION; FILLING THE CAVITY WITH LIQUID PLASTI C MATERIAL TO COVER THE THREADS AND GASKET AND SUBSTANTIALLY FILL THE CAVITY; SUBMERGING THE END OF AN ANNULAR FILTER CARTRIDGE INTO SAID CAVITY TO A DEPTH SUBSTANTIALLY ADJACENT THE LOWER PORTION OF SAID ENLARGED UPPER SECTION; AND SETTING THE PLASTIC MATERIAL UNTIL IT HARDENS TO A SOLID STATE.
Claim 2
Independent Claim
151 words
A METHOD OF SECURING A MOLDED PLASTIC RESIN END CAP WITH THREADS AND A RING GASKET FORMED INTEGRAL THEREWITH TO A FILTER CARTRIDGE COMPRISING: TAKING A MOLD DIE MEMBER WITH AN ANNULAR CAVITY HAVING AN ENLARGED ANNULAR UPPER SECTION, AN ANNULAR TAPERED SECTION THEREBLOW TERMINATING IN A NARROW ANNULAR SECTION FORMING THE BOTTOM OF THE CAVITY, WITH THREADS ON THE INNER SURFACE OF THE CAVITY ADJACENT THE TAPERED SECTION, AND A HORIZONTAL ANNULAR SHOULDER SECTION IN THE CAVITY ABOVE THE THREADED FORMATION TO FORM A GASKET SEAT; PLACING A RING GASKET ON THE HORIZONTAL SHOULDER SECTION; FILLING THE CAVITY WITH LIQUID PLASTI C MATERIAL TO COVER THE THREADS AND GASKET AND SUBSTANTIALLY FILL THE CAVITY; SUBMERGING THE END OF AN ANNULAR FILTER CARTRIDGE INTO SAID CAVITY TO A DEPTH SUBSTANTIALLY ADJACENT THE LOWER PORTION OF SAID ENLARGED UPPER SECTION; AND SETTING THE PLASTIC MATERIAL UNTIL IT HARDENS TO A SOLID STATE.
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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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |