US3143953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan
Assignee: CANYON SWI Inc
•
Filing: 1962-06-29
•
Granted: 1964-08-11
•
Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Billy L Bristol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:08
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN A VERTICAL DISCHARGE VENTILATOR, A VERTICAL HOUSING MEANS ADAPTED TO BE MOUNTED ON THE ROOF OR THE LIKE, SAID HOUSING MEANS HAVING OPEN ENDS; A FAN MOUNTED IN SAID HOUSING MEANS IN A HORIZONTAL PLANE AND EXTENDING SUBSTANTIALLY ACROSS THE OPENING THEREIN; MEANS FOR ROTATING SAID FAN; A HORIZONTAL TROUGH SHAPED MEDIAN MEMBER MOUNTED ON SAID HOUSING MEANS AND EXTENDING ACROSS SAID OPENING ABOVE SAID FAN; SUPPORT MEMBERS MOUNTED ON SAID HOUSING MEANS EXTENDING ACROSS SAID OPENING ABOVE SAID FAN ON EITHER SIDE OF SAID MEDIAN MEMBER, SAID MEMBERS BEING PARALLEL TO AND SPACED FROM SAID MEDIAN MEMBER AND THE WALL OF SAID HOUSING MEANS AND DEFINING A PLURALITY OF PASSAGEWAYS; OUTER DAMPER MEANS; MEANS
Claim 2
Dependent Claim
116 words
IN A VERTICAL DISCHARGE VENTILATOR, A VERTICAL HOUSING MEANS ADAPTED TO BE MOUNTED ON THE ROOF OR THE LIKE, SAID HOUSING MEANS HAVING OPEN ENDS; A FAN MOUNTED IN SAID HOUSING MEANS IN A HORIZONTAL PLANE AND EXTENDING SUBSTANTIALLY ACROSS THE OPENING THEREIN; MEANS FOR ROTATING SAID FAN; A HORIZONTAL TROUGH SHAPED MEDIAN MEMBER MOUNTED ON SAID HOUSING MEANS AND EXTENDING ACROSS SAID OPENING ABOVE SAID FAN; SUPPORT MEMBERS MOUNTED ON SAID HOUSING MEANS EXTENDING ACROSS SAID OPENING ABOVE SAID FAN ON EITHER SIDE OF SAID MEDIAN MEMBER, SAID MEMBERS BEING PARALLEL TO AND SPACED FROM SAID MEDIAN MEMBER AND THE WALL OF SAID HOUSING MEANS AND DEFINING A PLURALITY OF PASSAGEWAYS; OUTER DAMPER MEANS; MEANS
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |