US3595728A
Expired / Lapsed
US
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Thermal insulation
Assignee: Nuclear Power Group Ltd
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Filing: 1967-06-16
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Granted: 1971-07-27
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Expires: 1987-06-16
Abstract
Abstract THERMAL INSULATION FORMED FROM SHEET MEMBERS WITH SPACER MEMBERS SEPARATING THE SHEET MEMBERS TO FORM INTERSPACES WHICH ARE SEALED FROM ONE ANOTHER BY SEALS FORMED BY PAIRS OF CONTACTING SURFACES AT LEAST ONE SURFACE OF EACH PAIR BEING OF NON-METALLIC, HEAT RESISTANT MATERIAL, THE PERMEABILITY OF THE SPACER MEMBERS AND THE COMPRESSIBILITY OF THE NON-METALLIC MATERIAL BEING SUCH THAT THE SPACER MEMBERS IN CONJUCTION WITH SAID SEALS RESTRICT THE FLOW OF FLUID IN AND BETWEEN THE INTERSPACES.
Inventors
- 👤 Arthur Gray Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/06; B; B01; B01J; B01J3/00; B01J3/002; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/7608; E04B1/7612; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0875; F16L59/12; G; G21; G21C; G21C11/00; G21C11/08; G21C11/083; G21C11/085; G21C11/088; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S220/00; Y10S220/901; Y10S220/918; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/168; Y10T428/24; Y10T428/24174; Y10T428/249921; Y10T428/249923; Y10T428/249953; Y10T428/249962; Y10T428/249964
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |