US3353551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air by-pass arrangement operated by differential air pressure
Assignee: Motors Liquidation Co
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Filing: 1965-08-05
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Granted: 1967-11-21
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Expires: 1985-08-05
Abstract
No abstract record available.
Inventors
- 👤 Charles H Smale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1426; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/745; F24F13/1413; F24F13/15; F24F2013/1473; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2572; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
AN OUTDOOR AIR BY-PASS ARRANGEMENT COMPRISING A HOUSING, OPPOSED DOORS IN SAID HOUSING, ONE OF SAID DOORS BEING PIVOTALLY MOUNTED AND BALANCED AS TO A FIRST DIFFERENTIAL AIR PRESSURE EXERTED AGAINST IT, THE OTHER OF SAID DOORS BEING PIVOTALLY MOUNTED AND UNBALANCED AS TO A SECOND DIFFERENTIAL AIR PRESSURE EXERTED AGAINST IT, SPRING MEANS LINKED TO SAID DOORS URGING THEM TOWARD THEIR CLOSED POSITIONS, AN OPENING IN SAID HOUSING CONNECTING A ZONE BETWEEN SAID DOORS TO A SHELTERED AMBIENT AIR ZONE, AND THE ARRANGEMENT BEING SUCH THAT AN INCREASE IN SAID SECOND DIFFERENTIAL AIR PRESSURE IS ADAPTED TO OPEN SAID DOORS AGAINST THE ACTION OF SAID SPRING MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |