US5027546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-toxic method of exterminating insects
Assignee: Individual
•
Filing: 1989-04-13
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Granted: 1991-07-02
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Expires: 2009-04-13
Abstract
Abstract This invention concerns a non-toxic method of exterminating dry wood termites, fleas, roaches, ants, weevils and the like by utilizing an inert freezing liquid such as liquid nitrogen as the killing agent. The liquid nitrogen is inserted so as to envelop the colony of objectionable organisms until the environment is reduced to a temperature of at least zero degrees Fahrenheit and maintained at that temperature for between 2 to 5 minutes. This method effectively kills the organisms by crystalizing the innards and freezing the cells, thereby eliminating the need for more dangerous and toxic poisons that are currently being used.
Inventors
- 👤 Joseph C. Tallon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:38
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/72; A; A01; A01M; A01M1/00; A01M1/20; A01M1/2094; A01M1/24; A01M1/245; A01M2200/00; A01M2200/01; A01M2200/011
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
A method of exterminating drywood termites in an upright wooden member disposed behind a wall member comprising the steps of: locating a colony of drywood termites in the wooden member; forming a hole in said wall member above said colony adjacent to said wooden member; inserting nozzle means through said hole; applying cold fluid under pressure through said nozzle means to the surface of said wooden member; and permitting said fluid to flow under the force of gravity downwardly along the surface of said wooden member to reduce the temperature of the wooden member sufficiently to cause the extermination of the termites.
Claim 2
Independent Claim
102 words
A method of exterminating drywood termites in an upright wooden member disposed behind a wall member comprising the steps of: locating a colony of drywood termites in the wooden member; forming a hole in said wall member above said colony adjacent to said wooden member; inserting nozzle means through said hole; applying cold fluid under pressure through said nozzle means to the surface of said wooden member; and permitting said fluid to flow under the force of gravity downwardly along the surface of said wooden member to reduce the temperature of the wooden member sufficiently to cause the extermination of the termites.
Claim 3
Dependent Claim
85 words
A method according to claim 1, including the additional steps of: locating a fire stop in said wall below said hole; forming a lower hole in said wall adjacent to said wooden member and below said fire stop; inserting nozzle means through said lower hole; applying cold fluid under pressure through said nozzle means to the surface of said wooden member; and permitting said fluid to flow under the force of gravity along the surface of said wooden member from said fire stop downwardly therefrom.
Claim 4
Dependent Claim
16 words
A system of claim 1, having temperature sensing means for monitoring the temperature behind said wall.
Claim 5
Dependent Claim
45 words
A method of claim 1, having the further steps of: monitoring the temperature behind said wall; and adjusting the rate of application of said fluid to maintain a temperature behind said wall between 120° F. and 150° F. lower than the temperature outside said wall.
Claim 6
Dependent Claim
16 words
A method according to claim 1, in which said fluid is comprised substantially of liquid nitrogen.
Claim 7
Dependent Claim
16 words
A method according to claim 1, in which said fluid is comprised substantially of gaseous nitrogen.
Claim 8
Dependent Claim
17 words
A method according to claim 1, in which said fluid is comprised substantially of gaseous carbon dioxide.
Claim 9
Dependent Claim
23 words
A method according to claim 1, in which said fluid is kept in contact with said wooden member for at least five minutes.
Claim 10
Dependent Claim
29 words
A method according to claim 1, in which said fluid is applied to said wooden member at low pressure to thereby gradually reduce the temperature to said wooden member.
Claim 11
Dependent Claim
44 words
A method according to claim 1, including the additional steps of: monitoring the temperature of the side of said wooden member opposite the side to which said fluid is applied; and maintaining said temperature for a sufficient time to ensure extermination of said termites.
References Cited (Backward Citations)
US2842892A
Cited
US2981025A
Cited
US2915848A
Cited
US3676949A
Cited
US3602248A
Cited
US3624953A
Cited
US3911611A
Cited
US4028841A
Cited
US4160336A
Cited
US4322910A
Cited
US4625474A
Cited
US4648202A
Cited
US4742641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |