Patent US4069939A successfully refreshed from Google Patents.
US4069939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated structure
Assignee: Dow Chemical Co
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Filing: 1976-08-19
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Granted: 1978-01-24
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Expires: 1996-08-19
Abstract
Abstract Insulating members such as plastic foamed boards or panels are positioned on curved surfaces by affixing the panels or planks to strap members attached to and positioned adjacent the surface to be insulated. This technique is particularly suitable for the insulation of tanks and like containers.
Inventors
- 👤 Robert B. Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:05
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/06; Y; Y10; Y10S; Y10S220/00; Y10S220/902; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49922
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
An improved insulated structure, the structure comprising an inner structure having a convex curved surface, a plurality of sheet metal bands secured to the convex curved surface by a plurality of band retaining means affixed to the convex curved surface, at least some of the bands being disposed in generally parallel relationship, at least some of the bands having disposed thereunder malleable sheet metal blanks containing regions where the blanks are bent to form legs extending away from the surface, a plurality of insulating panels disposed on and generally conforming to the convex curved surface, the legs of said blanks being bent over adjacent insulating panels thereby retaining said insulating panels in position.
Claim 2
Dependent Claim
113 words
An improved insulated structure, the structure comprising an inner structure having a convex curved surface, a plurality of sheet metal bands secured to the convex curved surface by a plurality of band retaining means affixed to the convex curved surface, at least some of the bands being disposed in generally parallel relationship, at least some of the bands having disposed thereunder malleable sheet metal blanks containing regions where the blanks are bent to form legs extending away from the surface, a plurality of insulating panels disposed on and generally conforming to the convex curved surface, the legs of said blanks being bent over adjacent insulating panels thereby retaining said insulating panels in position.
Claim 3
Dependent Claim
12 words
The structure of claim 1 wherein the inner structure is a tank.
Claim 4
Dependent Claim
14 words
The structure of claim 1 wherein the insulating panels are closed cell plastic foam.
Claim 5
Dependent Claim
20 words
The structure of claim 1 wherein the band retaining means is a metal bar affixed to the convex curved surface.
Claim 6
Dependent Claim
19 words
The structure of claim 1 wherein the sheet metal bands are disposed under and around the band retaining means.
Claim 7
Dependent Claim
21 words
The structure of claim 1 wherein the major dimension of the insulating panel extends generally parallel to the sheet metal bands.
References Cited (Backward Citations)
US1336439A
Cited
US1251830A
Cited
GB380240A
Cited
US2323297A
Cited
US2295103A
Cited
US2731374A
Cited
US2738094A
Cited
US2931211A
Cited
US2928565A
Cited
US3003810A
Cited
US2980279A
Cited
US3010599A
Cited
US3243931A
Cited
US3253731A
Cited
USRE27330E
Cited
US3753848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |