US4073089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utilization of exhaust gases for plant growth
Assignee: University of Saskatchewan
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Filing: 1976-09-27
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Granted: 1978-02-14
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Expires: 1996-09-27
Abstract
Abstract A system for utilizing the exhaust gases from a hydrocarbon combusting apparatus to enhance plant growth comprising an enclosure for plants having an outer covering and an inner permeable membrane spaced from the outer layer, the membrane being less permeable to toxic gases, present in the exhaust, than to CO 2 , and means for conducting the exhaust gas from the hydrocarbon combusting apparatus to the space between the covering and the permeable membrane. In the preferred embodiment, the outer covering and membrane are transparent to light.
Inventors
- 👤 Edward A. Maginnes
- 👤 Eyrle E. Brooks
- 👤 Maynard O. Haukeness
- 👤 George H. Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:02
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A system for utilizing the exhaust gases from a hydrocarbon combusting apparatus to enhance plant growth, comprising an enclosure for plants having an outer covering and an inner permeable membrane spaced from the outer covering, means for conducting exhaust gases to the space between the covering and the membrane, and outlet means for waste gases from said space, said membrane having a lower permeability to the exhaust gas component toxic to plants than to CO 2 , limiting the passage of gases into the enclosure to a level tolerated by the plants.
Claim 2
Independent Claim
92 words
A system for utilizing the exhaust gases from a hydrocarbon combusting apparatus to enhance plant growth, comprising an enclosure for plants having an outer covering and an inner permeable membrane spaced from the outer covering, means for conducting exhaust gases to the space between the covering and the membrane, and outlet means for waste gases from said space, said membrane having a lower permeability to the exhaust gas component toxic to plants than to CO 2 , limiting the passage of gases into the enclosure to a level tolerated by the plants.
Claim 3
Dependent Claim
14 words
The system of claim 1 wherein the outer covering and inner membrane are transparent.
Claim 4
Dependent Claim
11 words
The system of claim 1 wherein the inner membrane comprises polyethelene.
Claim 5
Dependent Claim
28 words
The system of claim 1 further comprising means for mixing ambient air with the exhaust gases prior to conducting to the space between the covering and the membrane.
Claim 6
Dependent Claim
14 words
The system of claim 1 wherein the toxic gases are NO 2 and NO.
Claim 7
Dependent Claim
18 words
The system of claim 1 wherein the toxic gases are NO 2 , NO and SO 2 .
References Cited (Backward Citations)
US4003160A
Cited
US4012867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |