Patent US3252691A successfully refreshed from Google Patents.
US3252691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaning apparatus
Assignee: American Air Filter Co Inc
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Filing: 1962-03-30
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Granted: 1966-05-24
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Expires: 1982-03-30
Abstract
No abstract record available.
Inventors
- 👤 Allan R Getzin
- 👤 Ervin A Mcclain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A GAS CLEANING APPARATUS COMPRISING: (A) A HOUSING HAVING AN UPSTREAM GAS INLET AND A DOWNSTREAM GAS OUTLET SPACED THEREFROM TO DEFINE A PATH FOR A GAS STREAM TO BE TREATED; (B) A PAIR OF SPACED SUPPORT ROLLER MEANS POSITIONED IN SAID HOUSING SO THAT ONE ROLLER MEANS OF SAID PAIR IS ON ONE SIDE OF SAID GAS STREAM TO BE TREATED AND THE OTHER ROLLER MEANS IS ON THE OPPOSITE SIDE OF A GAS STREAM TO BE TREATED; (C) A POROUS FILTER MEDIUM BELT DISPOSED IN ENDLESS FASHION ABOUT SAID SPACED SUPPORT ROLLER MEANS; (D) MEANS TO DRIVE SAID FILTER MEDIUM BELT WHEREBY SAID BELT IS PASSED THROUGH A GAS STREAM TO BE TREATED; AND
Claim 2
Dependent Claim
116 words
A GAS CLEANING APPARATUS COMPRISING: (A) A HOUSING HAVING AN UPSTREAM GAS INLET AND A DOWNSTREAM GAS OUTLET SPACED THEREFROM TO DEFINE A PATH FOR A GAS STREAM TO BE TREATED; (B) A PAIR OF SPACED SUPPORT ROLLER MEANS POSITIONED IN SAID HOUSING SO THAT ONE ROLLER MEANS OF SAID PAIR IS ON ONE SIDE OF SAID GAS STREAM TO BE TREATED AND THE OTHER ROLLER MEANS IS ON THE OPPOSITE SIDE OF A GAS STREAM TO BE TREATED; (C) A POROUS FILTER MEDIUM BELT DISPOSED IN ENDLESS FASHION ABOUT SAID SPACED SUPPORT ROLLER MEANS; (D) MEANS TO DRIVE SAID FILTER MEDIUM BELT WHEREBY SAID BELT IS PASSED THROUGH A GAS STREAM TO BE TREATED; AND
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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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |