Patent US3866171A successfully refreshed from Google Patents.
Patent US3306179A successfully refreshed from Google Patents.
US3306179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan ventilator with air shroud means
Assignee: Colt Ventilation and Heating Ltd
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Filing: 1965-06-01
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Granted: 1967-02-28
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Lamble Howard Russell
- 👤 Burtenshaw Raymond Alfre Frank
- 👤 Gowan Peter Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:08
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/545; F24F7/00; F24F7/007; F24F7/02; F24F7/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A POWERED DISCHARGE VENTILATOR FOR USE MOUNTED ON A BOUNDING STRUCTURE OF A SPACE TO BE VENTILATED BY THE VENTILATOR TO EXTRACT AIR FROM SAID SPACE AND DISCHARGE IT TO THE OUTSIDE OF SAID BOUNDING STRUCTURE, THE VENTILATOR COMPRISING A BODY STRUCTURE ADAPTED TO BE MOUNTED ON THE BOUNDING STRUCTURE, SUPPORT MEANS CARRIED BY SAID BODY STRUCTURE, AN EXTRACTION FAN INCLUDING AN IMPELLER MOTOR UNIT MOUNTED ON SAID SUPPORT MEANS AND HOUSED IN SAID BODY STRUCTURE, SAID BODY STRUCTURE DEFINING PASSAGE MEANS LEADING OUTSIDE SAID SPACE FOR THE DISCHARGE OF THE EXTRACTED AIR, A CIRCULAR SECTIONED SHROUD MOUNTED ON SAID SUPPORT MEANS AND HOUSED IN SAID BODY STRUCTURE, SAID SHROUD HAVING A DOWNSTREAM END AND AN UPSTREAM END, THE DOWNSTREAM END OF THE SHROUD CLOSELY SURROUNDING THE TIPS OF THE BLADES OF THE IMPELLER OF SAID IMPELLER
Claim 2
Dependent Claim
137 words
A POWERED DISCHARGE VENTILATOR FOR USE MOUNTED ON A BOUNDING STRUCTURE OF A SPACE TO BE VENTILATED BY THE VENTILATOR TO EXTRACT AIR FROM SAID SPACE AND DISCHARGE IT TO THE OUTSIDE OF SAID BOUNDING STRUCTURE, THE VENTILATOR COMPRISING A BODY STRUCTURE ADAPTED TO BE MOUNTED ON THE BOUNDING STRUCTURE, SUPPORT MEANS CARRIED BY SAID BODY STRUCTURE, AN EXTRACTION FAN INCLUDING AN IMPELLER MOTOR UNIT MOUNTED ON SAID SUPPORT MEANS AND HOUSED IN SAID BODY STRUCTURE, SAID BODY STRUCTURE DEFINING PASSAGE MEANS LEADING OUTSIDE SAID SPACE FOR THE DISCHARGE OF THE EXTRACTED AIR, A CIRCULAR SECTIONED SHROUD MOUNTED ON SAID SUPPORT MEANS AND HOUSED IN SAID BODY STRUCTURE, SAID SHROUD HAVING A DOWNSTREAM END AND AN UPSTREAM END, THE DOWNSTREAM END OF THE SHROUD CLOSELY SURROUNDING THE TIPS OF THE BLADES OF THE IMPELLER OF SAID IMPELLER
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |