Patent US3823745A successfully refreshed from Google Patents.
US3823745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-resistant conduit covering
Assignee: Keller Glove Manufacturing Co
•
Filing: 1972-11-06
•
Granted: 1974-07-16
•
Expires: 1992-11-06
Abstract
Abstract A flame-resistant conduit covering knitted from an organic material such as flame-retardant rayon having looped pile on at least one surface thereof is disclosed. The knitted material is free from any finish which releases substantial amounts of toxic gases other than CO or CO2 when subjected to heat, whereby it may be used in place of prior art conduit coverings made from a flame-retardant material such as asbestos.
Inventors
- 👤 R Schafenacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:12
CPC Classifications
F; F16; F16L; F16L57/00; F16L57/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
Apparatus in accordance with claim 1 wherein said covering has a longitudinally extending lap joint.
Claim 2
Dependent Claim
15 words
Apparatus in accordance with claim 1 wherein said covering is helically wound around said conduit.
Claim 3
Dependent Claim
27 words
Apparatus in accordance with claim 1 including rigid insulation material between said covering and said conduit, said rigid insulation material being held in place by said covering.
Claim 4
Dependent Claim
17 words
Apparatus in accordance with claim 1 wherein said covering is a seamless cylinder stretched over said conduit.
Claim 5
Dependent Claim
21 words
Apparatus in accordance with claim 1 including an aluminum coating on said one surface, said coating being bonded to said loopS.
Claim 6
Dependent Claim
15 words
Apparatus in accordance with claim 1 wherein said covering is adhesively bonded to said conduit.
Claim 7
Dependent Claim
18 words
Apparatus in accordance with claim 1 wherein said loop pile is on the inner surface of said covering.
Claim 8
Dependent Claim
18 words
Apparatus in accordance with claim 1 wherein said material is knitted from filaments which are a fire-retardant material.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |