US4759227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lysimeter
Assignee: JACOBSEN SAM J
•
Filing: 1986-04-21
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Granted: 1988-07-26
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Expires: 2006-04-21
Abstract
Abstract An improved lysimeter is described for collecting soil water which is truly representative of the soil water contained in the soil at selected locations. The lysimeter contains a chamber and a filter section which is a rigid, porous fluoroplastic and through which moisture from the soil surrounding the lysimeter may pass into the chamber. The invention also includes a process for using the lysimeter to recover soil moisture in the lysimeter chamber.
Inventors
- 👤 Robert D. Timmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:06
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/14; C; C08; C08J; C08J9/00; C08J9/26; E; E02; E02D; E02D1/00; E02D1/02; E02D1/06; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; G01N33/00; G01N33/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
30 words
A lysimeter containing a chamber having a wall containing a filter section which is formed of fluoroplastic resin, said resin being rigid and porous and capable of passing moisture therethrough.
Claim 2
Dependent Claim
30 words
A lysimeter containing a chamber having a wall containing a filter section which is formed of fluoroplastic resin, said resin being rigid and porous and capable of passing moisture therethrough.
Claim 3
Dependent Claim
17 words
A lysimeter as set forth in claim 1 in which said filter section is made of polytetrafluoroethylene.
Claim 4
Dependent Claim
36 words
A lysimeter as set forth in claim 1 in which said chamber is bounded by a cylindrical wall and in which said wall contains a central filter section which is formed of rigid porous fluoroplastic resin.
Claim 5
Dependent Claim
15 words
A lysimete as set forth in claim 3 in which said fluoroplastic resin is polytetrafluoroethylene.
Claim 6
Dependent Claim
77 words
A process for recovering soil water comprising making a hole in the earth at a location from which soil water is to be recovered, lowering into said hole a lysimeter having a chamber and a wall bordering said chamber, one section of said wall constituting a filter, said filter section being of porous rigid fluoroplastic resin, and withdrawing through a tube connected with said chamber soil water which has passed through said filter section into said chamber.
Claim 7
Dependent Claim
77 words
A process for recovering soil water comprising making a hole in the earth at a location from which soil water is to be recovered, lowering into said hole a lysimeter having a chamber and a wall bordering said chamber, one section of said wall constituting a filter, said filter section being of porous rigid fluoroplastic resin, and withdrawing through a tube connected with said chamber soil water which has passed through said filter section into said chamber.
Claim 8
Dependent Claim
17 words
A process as set forth in claim 5 in which said filter section is rigid porous polytetrafluoroethylene.
Claim 9
Dependent Claim
36 words
A process as set forth in claim 5 including the step of drawing a vacuum on said chamber through a tube connected with said chamber to urge soil water through said filter section into said chamber.
Claim 10
Dependent Claim
40 words
A process as set forth in claim 5 which includes lowering into said hole a lysimeter containing said chamber, placing a slurry of crystalline silica in said hole about said lysimeter prior to withdrawal of soil water from said chamber.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |