US3264843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air damper
Assignee: Westinghouse Electric Corp
•
Filing: 1965-05-06
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Granted: 1966-08-09
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Expires: 1985-05-06
Abstract
No abstract record available.
Inventors
- 👤 Michael D Ulich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:33
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F11/70; F24F11/72; F24F11/74; F24F13/00; F24F13/08; F24F13/10; F24F13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A DAMPER AND AIR FLOW CONTROL ARRANGEMENT FOR THE SELECTIVE INTERCHANGE OF AIR BETWEEN GENERALLY PARALLEL, UNI-DIRECTIONAL AIR FLOW PARTS ALONG OPPOSITE FACES OF A WALL CONTAINING AN OPENING THROUGH WHICH SAID INTERCHANGE TAKES PLACE, COMPRISING: AN OPEN-FACE FRAME MOUNTED IN SAID OPENING, SAID FRAME INCLUDING FLANGE MEANS BORDERING THE FRAMED OPENING ON EACH FACE OF SAID FRAME; A PAIR OF COVERS DISPOSED IN MIRROR RELATION AGAINST OPPOSITE FACES OF SAID FRAME AND INCLUDING SHOULDER MEANS ON THEIR INNER FACES ABUTTING SAID FLANGE MEANS; EACH COVER INCLUDING AN EXTENDED-SURFACE AREA PORTION AND AN INWARLY-OPEN, OUTWARDLY-PROJECTING HOLLOW, SHELL THEREON HAVING AN AXIS NORMAL TO SAID FRAME;
Claim 2
Dependent Claim
105 words
A DAMPER AND AIR FLOW CONTROL ARRANGEMENT FOR THE SELECTIVE INTERCHANGE OF AIR BETWEEN GENERALLY PARALLEL, UNI-DIRECTIONAL AIR FLOW PARTS ALONG OPPOSITE FACES OF A WALL CONTAINING AN OPENING THROUGH WHICH SAID INTERCHANGE TAKES PLACE, COMPRISING: AN OPEN-FACE FRAME MOUNTED IN SAID OPENING, SAID FRAME INCLUDING FLANGE MEANS BORDERING THE FRAMED OPENING ON EACH FACE OF SAID FRAME; A PAIR OF COVERS DISPOSED IN MIRROR RELATION AGAINST OPPOSITE FACES OF SAID FRAME AND INCLUDING SHOULDER MEANS ON THEIR INNER FACES ABUTTING SAID FLANGE MEANS; EACH COVER INCLUDING AN EXTENDED-SURFACE AREA PORTION AND AN INWARLY-OPEN, OUTWARDLY-PROJECTING HOLLOW, SHELL THEREON HAVING AN AXIS NORMAL TO SAID FRAME;
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |