US3263704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible support duct for removable element
Assignee: Farr Co Ltd
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Filing: 1964-07-16
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Granted: 1966-08-02
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Expires: 1984-07-16
Abstract
No abstract record available.
Inventors
- 👤 Gerald F Boisjoly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:00
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/002; F16L21/005; F16L51/00; F16L51/02; F16L51/021; F24; F24F; F24F13/00; F24F13/02; F24F13/0209; Y; Y10; Y10S; Y10S55/00; Y10S55/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN AN AIR CONDITIONING SYSTEM OR LIKE INSTALLATION, DUCT MEANS HAVING TWO FIXED SPACED APART TRANSVERSE DUCT FACES, A FILTER ELEMENT REMOVABLY POSITIONED AGAINST ONE OF SAID DUCT FACES, A COLLAPSIBLE DUCT PORTION POSITIONED BETWEEN THE OTHER OF SAID DUCT FACES AND SAID FILTER ELEMENT AND SECURELY ATTACHED TO SAID OTHER DUCT FACE, AND RELEASABLE CLAMP MEANS ADAPTED TO CLAMP SAID FILTER ELEMENT TO SAID COLLAPSIBLE DUCT PORTION AND TO SAID FIRST MENTIONED DUCT FACE, SAID COLLAPSIBLE DUCT PORTION ADAPTED TO COLLAPSE TO PROVIDE AXIAL CLEARANCE FOR THE REMOVAL OF SAID FILTER ELEMENT WHEN SAID CLAMP MEANS IS RELEASED.
Claim 2
Dependent Claim
99 words
IN AN AIR CONDITIONING SYSTEM OR LIKE INSTALLATION, DUCT MEANS HAVING TWO FIXED SPACED APART TRANSVERSE DUCT FACES, A FILTER ELEMENT REMOVABLY POSITIONED AGAINST ONE OF SAID DUCT FACES, A COLLAPSIBLE DUCT PORTION POSITIONED BETWEEN THE OTHER OF SAID DUCT FACES AND SAID FILTER ELEMENT AND SECURELY ATTACHED TO SAID OTHER DUCT FACE, AND RELEASABLE CLAMP MEANS ADAPTED TO CLAMP SAID FILTER ELEMENT TO SAID COLLAPSIBLE DUCT PORTION AND TO SAID FIRST MENTIONED DUCT FACE, SAID COLLAPSIBLE DUCT PORTION ADAPTED TO COLLAPSE TO PROVIDE AXIAL CLEARANCE FOR THE REMOVAL OF SAID FILTER ELEMENT WHEN SAID CLAMP MEANS IS RELEASED.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |