US3675429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arctic ice platform
Assignee: ExxonMobil Upstream Research Co
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Filing: 1970-04-03
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Granted: 1972-07-11
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Expires: 1990-04-03
Abstract
Abstract A method of forming a permanent offshore platform in areas where a mass of ice rests on the earth''s surface in winter but thaws during more moderate weather. The platform is formed by insulating the surface of the ice proximate the drilling site to prevent any substantial thawing of the ice.
Inventors
- 👤 Bertram T Wlliman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
E; E02; E02D; E02D27/00; E02D27/01; E02D27/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A method of forming a permanent ice platform in a shallow body of water which freezes to form a bottom-fast mass of ice in the winter and thaWs during moderate weather comprising: a. applying a layer of a nonaqueous insulating material to the surface of said mass of ice at a time when said mass of ice is fixed to the bottom, said layer being sufficiently thick to prevent any substantial melting of said mass of ice during moderate weather; b. excavating a trench around the periphery of the insulated ice surface; and thereafter, c. applying a layer of insulating material to the peripheral surface of the ice mass.
Claim 2
Independent Claim
109 words
A method of forming a permanent ice platform in a shallow body of water which freezes to form a bottom-fast mass of ice in the winter and thaWs during moderate weather comprising: a. applying a layer of a nonaqueous insulating material to the surface of said mass of ice at a time when said mass of ice is fixed to the bottom, said layer being sufficiently thick to prevent any substantial melting of said mass of ice during moderate weather; b. excavating a trench around the periphery of the insulated ice surface; and thereafter, c. applying a layer of insulating material to the peripheral surface of the ice mass.
Claim 3
Dependent Claim
43 words
The method defined by claim 1 further comprising the steps of: a. removing said insulating material, as required, during cold weather to refreeze any ice that has melted; and thereafter, b. replacing said insulating material to prevent ice from melting during mild weather.
Claim 4
Dependent Claim
27 words
The method defined by claim 1 further comprising the step of refrigerating the ice beneath said insulating material, as required, to refreeze any ice that has melted.
Claim 5
Independent Claim
127 words
A method of forming a permanent ice platform in a shallow body of water which freezes to form a bottom-fast mass of ice in the winter and thaws during moderate weather comprising: a. applying a layer of nonaqueous insulating material to the surface of said mass of ice at a time when said mass of ice is fixed to the bottom, said layer being sufficiently thick to prevent any substantial melting of ice during moderate weather; b. coating the surface of said layer of insulating material with a substance which adheres to said material and reflects radiant energy; c. excavating a trench around the periphery of the insulated ice surface; and thereafter, d. applying a layer of insulating material to the peripheral surface of the ice mass.
Claim 6
Independent Claim
127 words
A method of forming a permanent ice platform in a shallow body of water which freezes to form a bottom-fast mass of ice in the winter and thaws during moderate weather comprising: a. applying a layer of nonaqueous insulating material to the surface of said mass of ice at a time when said mass of ice is fixed to the bottom, said layer being sufficiently thick to prevent any substantial melting of ice during moderate weather; b. coating the surface of said layer of insulating material with a substance which adheres to said material and reflects radiant energy; c. excavating a trench around the periphery of the insulated ice surface; and thereafter, d. applying a layer of insulating material to the peripheral surface of the ice mass.
Claim 7
Dependent Claim
44 words
The method defined by claim 4 further comprising the steps of: a. removing said insulating material, as required, during cold weather to refreeze any ice that has melted; and thereafter, b. replacing said insulating material to prevent the ice from melting during warm weather.
Claim 8
Dependent Claim
28 words
The method as defined by claim 4 further comprising the step of refrigerating the ice beneath said insulating material, as required, to refreeze any ice that has melted.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |