Patent US3073097A successfully refreshed from Google Patents.
US3073097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas filtration plant
Assignee: Cheltenham Auto Controls Ltd
•
Filing: 1960-03-31
•
Granted: 1963-01-15
•
Expires: 1980-03-31
Abstract
No abstract record available.
Inventors
- 👤 Hallett Henry Albert
- 👤 Young Robert William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:47
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/42; B01D46/4272; B01D46/44; B01D46/446; B01D46/66; B01D46/70; B01D46/71; G; G05; G05D; G05D16/00; G05D16/14; G05D16/16; G05D16/163; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A GAS FILTRATION PLANT COMPRISING A HOUSING CONTAINING A FILTER ELEMENT, SUCH AS A FILTER BAG, MEANS FOR PRODUCING A REVERSE GAS BLAST TO CLEAN SAID ELEMENT, AND PNEUMATIC CONTROL MEANS COMPRISING A MEMBER, A NOZZLE EXHAUSTING TO ATMOSPHERE AND VARIABLY THROTTLED BY SAID MEMBER, A RESTRICTOR THROUGH WHICH SAID NOZZLE IS SUPPLIED, MEANS FOR APPLYING A DIFFERENTIAL FORCE IN ONE DIRECTION TO SAID MEMBER DEPENDENT UPON THE PRESSURE DROP ACROSS SAID ELEMENT, AND MEANS FOR APPLYING A REFERENCE PRESSURE DEPENDENT UPON AN EXTERNALLY PRODUCED PNEUMATIC REFERENCE PRESSURE TO SAID CONTROL MEMBER IN DIRECT OPPOSITION TO SAID DIFFERENTIAL FORCE, THE PRESSURE OF SAID RESTRICTOR PROVIDING A PNEUMATIC CONTROL SIGNAL ACCORDING TO THE RESULTANT FORCE APPLIED TO SAID MEMBER, SAID CONTROL SIGNAL BEING FED TO SAID MEANS FOR PRODUCING A REVERSE GAS BLAST TO ACTUATE SUCH MEANS IN DEPENDENCE UPON THE DIFFERENCE BETWEEN SAID PRESSURE DROP AND SAID REFERENCE PRESSURE.
Claim 2
Dependent Claim
149 words
A GAS FILTRATION PLANT COMPRISING A HOUSING CONTAINING A FILTER ELEMENT, SUCH AS A FILTER BAG, MEANS FOR PRODUCING A REVERSE GAS BLAST TO CLEAN SAID ELEMENT, AND PNEUMATIC CONTROL MEANS COMPRISING A MEMBER, A NOZZLE EXHAUSTING TO ATMOSPHERE AND VARIABLY THROTTLED BY SAID MEMBER, A RESTRICTOR THROUGH WHICH SAID NOZZLE IS SUPPLIED, MEANS FOR APPLYING A DIFFERENTIAL FORCE IN ONE DIRECTION TO SAID MEMBER DEPENDENT UPON THE PRESSURE DROP ACROSS SAID ELEMENT, AND MEANS FOR APPLYING A REFERENCE PRESSURE DEPENDENT UPON AN EXTERNALLY PRODUCED PNEUMATIC REFERENCE PRESSURE TO SAID CONTROL MEMBER IN DIRECT OPPOSITION TO SAID DIFFERENTIAL FORCE, THE PRESSURE OF SAID RESTRICTOR PROVIDING A PNEUMATIC CONTROL SIGNAL ACCORDING TO THE RESULTANT FORCE APPLIED TO SAID MEMBER, SAID CONTROL SIGNAL BEING FED TO SAID MEANS FOR PRODUCING A REVERSE GAS BLAST TO ACTUATE SUCH MEANS IN DEPENDENCE UPON THE DIFFERENCE BETWEEN SAID PRESSURE DROP AND SAID REFERENCE PRESSURE.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |