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United States Utility Patents
4,042,020 - 4,042,029
Previous 10 Next 10
| Number | | Title |
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4,042,020 |
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Positive seal pitless well adapter |
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4,042,021 |
|
Connection between water tubes |
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4,042,022 |
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Devices for centralizing pipes in borings |
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4,042,023 |
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Control line protector |
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4,042,024 |
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Subsurface well apparatus having flexing means and method of using same |
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4,042,025 |
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Hydraulic control system underflow valve control method and apparatus |
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4,042,026 |
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Method for initiating an in-situ recovery process by the introduction of oxygen |
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4,042,027 |
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Recovery of petroleum from viscous asphaltic petroleum containing formations including tar sand deposits |
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4,042,028 |
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Adjustable tube shade roller |
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4,042,029 |
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Carbon-dioxide-assisted production from extensively fractured reservoirs |
For U.S. patent law, rules, and procedures see MPEP.
Disclaimer. Information presented on this page while believed to be reliable, is provided "as is" with no warranties of its accuracy or timeliness. For legal advice seek help of a licensed professional.
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