US4004394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for insulation of curved surfaces
Assignee: Dow Chemical Co
•
Filing: 1974-10-15
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Granted: 1977-01-25
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Expires: 1994-10-15
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
2026-11-10 02:15
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: 4
Claim 1
Independent Claim
107 words
A method for the fabrication of an insulated structure, the structure having an external convex curved surface to which thermal insulation is to be applied, the steps of the method consisting essentially of affixing to the convex curved surface to be insulated a plurality of sheet metal bands, at least some of the bands extending in generally parallel relationship, disposing malleable sheet metal blanks beneath the bands bending the blanks to form legs extending away from the surface, disposing a plurality of insulating panels on the curved surface to be insulated and retaining the insulating members thereon by means of bending said legs over adjacent insulating members.
Claim 2
Independent Claim
107 words
A method for the fabrication of an insulated structure, the structure having an external convex curved surface to which thermal insulation is to be applied, the steps of the method consisting essentially of affixing to the convex curved surface to be insulated a plurality of sheet metal bands, at least some of the bands extending in generally parallel relationship, disposing malleable sheet metal blanks beneath the bands bending the blanks to form legs extending away from the surface, disposing a plurality of insulating panels on the curved surface to be insulated and retaining the insulating members thereon by means of bending said legs over adjacent insulating members.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the structure is a tank.
Claim 4
Dependent Claim
25 words
The method of claim 1 including the step of disposing a batten strip on joints formed by at least some of the adjacent insulating members.
References Cited (Backward Citations)
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Cited
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US2881877A
Cited
US2966705A
Cited
US2955686A
Cited
US3359701A
Cited
US3456835A
Cited
US3782452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |