Patent US3580322A successfully refreshed from Google Patents.
US3580322A
Expired / Lapsed
US
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Flexible refractory curtain
Assignee: Saint Gobain Abrasives Inc
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Filing: 1969-04-14
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Granted: 1971-05-25
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Expires: 1989-04-14
Abstract
Abstract A flexible refractory curtain or covering is disclosed which is made up of an essentially horizontal supporting rod or tube to which is attached a network of flexible vertical and horizontal wires or cables to which are affixed segments made from a refractory material like silicon carbide, alumina or the like. The segments are so shaped and assembled on the flexible network that when the curtain is hanging in a vertical position the segments mate to form an effectively solid wall which functions as a barrier to the passage of heat and gases.
Inventors
- 👤 David B Herbert
- 👤 Ronald N Barney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:11
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/18; F27D1/1858; C; C10; C10B; C10B25/00; C10B25/02; E; E06; E06B; E06B5/00; E06B5/10; E06B5/16; E06B3/00; E06B3/70; E06B3/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
The flexible refractory curtain of claim 1 wherein said segments are generally rectangular in configuration, each having essentially flat end sides, front side, and back side, and a convex top side or bottom side.
Claim 2
Dependent Claim
147 words
The refractory segments of claim 1 containing in addition thereto a hole originating at one vertical side which passes through the segment in a horizontal direction, said hole terminating open endedly at the opposite vertical side thereby providing a means for attaching said segments to said horizontal members of said flexible secondary supporting means, said segments containing in addition a third hole of smaller diameter originating at either the front or back side of the segment, passing through the segment in a horizontal direction meeting with the intersection of said horizontal and vertical holes and passing beyond and terminating prior to reaching the opposite side of said segments, said smaller diameter horizontal hole being adapted to receive a pin composed of a heat-resistant material and to guide said pin so as to cause it to pass through the horizontal and vertical members of said secondary supporting means.
References Cited (Backward Citations)
US1939417A
Cited
US2454292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |