Patent US3217468A successfully refreshed from Google Patents.
US3217468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric tube type dust collector and method of operating the same
Assignee: American Air Filter Co Inc
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Filing: 1961-09-27
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Granted: 1965-11-16
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Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Leonard J O'dell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:06
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D46/42; B01D46/4272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD OF COLLECTING CONTAMINANT PARTICLES FROM A DIRTY GAS STREAM INCLUDING THE CYCLE STEPS OF PASSING SUCH DIRTY GAS STREAM INTO AN OPEN END OF ANID THROUGH THE WALLS OF A GAS PERVIOUS FABRIC TUBULAR COLLECTOR AT A FIRST PRESSURE AND VELOCITY SUFFICIENT TO MAINTAIN SAID FABRIC TUBULAR COLLECTOR IN INFLATED FORM WITH CONTAMINANT PARTICLES IN SUCH DIRTY GAS STREAM COLLECTING ON THE INNER SURFACE OF THE WALLS OF SAID FABRIC TUBULAR COLLECTOR; THEREAFTER CLEANING THE COLLECTOR IN A CLEANING CYCLE COMPRISING STOPPING THE FLOW OF SAID DIRTY GAS STREAM INTO SAID FABRIC TUBULAR COLLECTOR WHEN A CAKE OF CONTAMINANT PARTICLES HAS COLLECTED ON THE INNER SURFACE OF THE WALLS THEREOF; PASSING A CLEAN GAS STREAMO IN A REVERSE DIRECTION THROUGH SAID FABRIC TUBULAR COLLECTOR AT SUFFICIENT PRESSURE AND VELOCITY AND FOR A PRESELECTED TIME INTERVAL DURING THE CLEANING CYCLE TO AT LEAST PARTIALLY COLLAPSE
Claim 2
Independent Claim
146 words
A METHOD OF COLLECTING CONTAMINANT PARTICLES FROM A DIRTY GAS STREAM INCLUDING THE CYCLE STEPS OF PASSING SUCH DIRTY GAS STREAM INTO AN OPEN END OF ANID THROUGH THE WALLS OF A GAS PERVIOUS FABRIC TUBULAR COLLECTOR AT A FIRST PRESSURE AND VELOCITY SUFFICIENT TO MAINTAIN SAID FABRIC TUBULAR COLLECTOR IN INFLATED FORM WITH CONTAMINANT PARTICLES IN SUCH DIRTY GAS STREAM COLLECTING ON THE INNER SURFACE OF THE WALLS OF SAID FABRIC TUBULAR COLLECTOR; THEREAFTER CLEANING THE COLLECTOR IN A CLEANING CYCLE COMPRISING STOPPING THE FLOW OF SAID DIRTY GAS STREAM INTO SAID FABRIC TUBULAR COLLECTOR WHEN A CAKE OF CONTAMINANT PARTICLES HAS COLLECTED ON THE INNER SURFACE OF THE WALLS THEREOF; PASSING A CLEAN GAS STREAMO IN A REVERSE DIRECTION THROUGH SAID FABRIC TUBULAR COLLECTOR AT SUFFICIENT PRESSURE AND VELOCITY AND FOR A PRESELECTED TIME INTERVAL DURING THE CLEANING CYCLE TO AT LEAST PARTIALLY COLLAPSE
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |