Patent US4172459A successfully refreshed from Google Patents.
Patent US2795290A successfully refreshed from Google Patents.
US2795290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filter
Assignee: Uniroyal Inc
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Filing: 1954-11-01
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Granted: 1957-06-11
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Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Paul V Butsch
- 👤 John A Greenlee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/163; Y; Y10; Y10S; Y10S264/00; Y10S264/75
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
THE METHOD OF MAKING A GAS FILTER FOR REMOVING SUSPENDED PARTICLES OF MATTER FROM A GAS WHICH COMPRISES CONTRIFUGALLY FORCING PARTICULATE POLYETHYLENE AGAINST A ROTATING SLOTTED ELECTRICAL HEATING ELEMENT AND THEREBY EFFECTING MELTING THEREOF AND EJECTION IN THE FORM OF MOLTEN FILAMENTS OUTWARDLY THROUGH THE SLOTS OF SAID HEATING ELEMENT INTO THE SORROUNDING AIR IN A MANNER GENERALLY SIMILAR TO THAT BY WHICH CANDY FLOSS IS MADE, SAID FILAMENTS COALESCING WITH ONE ANOTHER AT OCCASIONAL POINTS AND SOLIDIFYING UPON CONTACT WITH THE AIR TO FORM A MASS OF TANGLED, RANDOMLY DISPOSED POLYETHYLENE FILAMENTTS WHICH ARE IRREGULARLY KINKED, WHICH VARY WIDELY IN DIAMETER THROUGHOUT THE MASS, AND WHICHA RE FUSED TO CONTIGUOUS FIALMENTS AT SAID POINTS TO FORM AN INTEGRATED MASS, COLLECTING THE MASS, AND FILLING A FORAMINOUS CONTAINER THEREWITH.
Claim 2
Independent Claim
129 words
THE METHOD OF MAKING A GAS FILTER FOR REMOVING SUSPENDED PARTICLES OF MATTER FROM A GAS WHICH COMPRISES CONTRIFUGALLY FORCING PARTICULATE POLYETHYLENE AGAINST A ROTATING SLOTTED ELECTRICAL HEATING ELEMENT AND THEREBY EFFECTING MELTING THEREOF AND EJECTION IN THE FORM OF MOLTEN FILAMENTS OUTWARDLY THROUGH THE SLOTS OF SAID HEATING ELEMENT INTO THE SORROUNDING AIR IN A MANNER GENERALLY SIMILAR TO THAT BY WHICH CANDY FLOSS IS MADE, SAID FILAMENTS COALESCING WITH ONE ANOTHER AT OCCASIONAL POINTS AND SOLIDIFYING UPON CONTACT WITH THE AIR TO FORM A MASS OF TANGLED, RANDOMLY DISPOSED POLYETHYLENE FILAMENTTS WHICH ARE IRREGULARLY KINKED, WHICH VARY WIDELY IN DIAMETER THROUGHOUT THE MASS, AND WHICHA RE FUSED TO CONTIGUOUS FIALMENTS AT SAID POINTS TO FORM AN INTEGRATED MASS, COLLECTING THE MASS, AND FILLING A FORAMINOUS CONTAINER THEREWITH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |