US5139542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for filtering benzo-a-pyrene from a gas stream
Assignee: Individual
•
Filing: 1991-02-22
•
Granted: 1992-08-18
•
Expires: 2011-02-22
Abstract
Abstract The present invention relates to a method of filtering, at the end user's home, business or the like, a gas stream in which benzo-a-pyrene has been concentrated at sufficient levels to be a significant health hazard. Steps of the invention include: (a) introducing the natural gas stream to a filter selected from a group that includes at least activated charcoal and impingement adsorbing media whereby benzo-a-pyrene concentrated in the gas stream at sufficient levels to be a health threat by aperiodic loading of such network in which benzo-a-pyrene become clumped into packets due to dampening effects of the compressor-driven equipment and multiple customer outlet usage coupled with surprising longivity of the in situ benzo-a-pyrene, is filtered from the gas stream and captured irrespective of mode of transport, (b) passing the filtered natural gas stream to the customer's gas appliance wherein safe use of the energy associated with the stream occurs, (c) periodically and safely removing the filter of step (a) for disposing of captured benzo-a-pyrene, (d) inserting a new filter in place of the removed filter of step (c).
Inventors
- 👤 Richard F. Sowinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:44
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0415; B01D53/0431; B01D53/0446; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/106; B01D2253/20; B01D2253/202; B01D2253/30; B01D2253/302; B01D2253/311; B01D2257/00; B01D2257/70; B01D2257/702; B01D2257/7027; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40084; B01D2259/414; B01D2259/4141; B01D2259/4145; B01D2259/4146; B01D2259/45; B01D2259/4508; B01D53/26; B01D53/261
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
165 words
A method of filtering, adjacent to an end user-customer's residence or business in which at least a single gas appliance is located, a natural gas stream in which benzo-a-pyrene has been concentrated at sufficient levels to be a health threat in a natural gas gathering and distributing network, comprising the steps of: (a) introducing the natural gas stream to a filter selected from a group that includes impingement, absorbing and adsorbing media whereby benzo-a-pyrene concentrated in the gas stream at sufficient levels to be a health threat by aperiodic loading of the natural gas within the gathering and distributing network, are filtered from the gas stream and captured irrespective of mode of transport, (b) passing the filtered natural gas stream to the customer's gas appliance wherein safe use of the energy associated with the stream occurs, (c) periodically and safely removing the filter of step (a) for disposing of captured benzo-a-pyrene, (d) inserting a new filter in place of the removed filter of step (c).
Claim 2
Independent Claim
165 words
A method of filtering, adjacent to an end user-customer's residence or business in which at least a single gas appliance is located, a natural gas stream in which benzo-a-pyrene has been concentrated at sufficient levels to be a health threat in a natural gas gathering and distributing network, comprising the steps of: (a) introducing the natural gas stream to a filter selected from a group that includes impingement, absorbing and adsorbing media whereby benzo-a-pyrene concentrated in the gas stream at sufficient levels to be a health threat by aperiodic loading of the natural gas within the gathering and distributing network, are filtered from the gas stream and captured irrespective of mode of transport, (b) passing the filtered natural gas stream to the customer's gas appliance wherein safe use of the energy associated with the stream occurs, (c) periodically and safely removing the filter of step (a) for disposing of captured benzo-a-pyrene, (d) inserting a new filter in place of the removed filter of step (c).
Claim 3
Dependent Claim
38 words
The method of claim 1 in which said impingement, absorbing and adsorbing media of step (a) for filtering benzo-a-pyrene, are selected from the group comprising pleated filter paper, silica gel, open pore polyurethane foam and granular activated charcoal.
Claim 4
Dependent Claim
41 words
The method of claim 2 in which said impingement, absorbing and adsorbing media of step (a) comprises in seriatim, pleated filter paper, silica gel, open pore polyurethane foam and granular activated charcoal whereby benzo-a-pyrene is removed from the natural gas stream.
Claim 5
Dependent Claim
36 words
The method of claim 1 in which step (a) is further characterized by aperiodic loading of in situ benzo-a-pyrene being the result of gas phase transition effects occurring within the natural gas gathering and distribution network.
Claim 6
Dependent Claim
62 words
The method of claim 4 in which step (a) is further characterized by the natural gas gathering and distributing network including compressor-driven equipment and multiple customer outlets connected to such equipment and by aperiodic loading of in situ benzo-a-pyrene within the natural gas gathering and distributing network being the result of dampening effects of the compressor-driven equipment and multiple customer outlet usage.
Claim 7
Dependent Claim
43 words
The method of claim 5 in which the natural gas gathering and distributing network includes gas meters each connected to one of the outlets of the network and wherein said filtering occurs after such gas stream exits from the end user's gas meter.
Claim 8
Dependent Claim
18 words
The method of claim 1 in which said filtering occurs in the natural gas gathering and distributing network.
Claim 9
Independent Claim
140 words
A method of filtering adjacent to an end-user-customer's residence or business in which at least a single gas appliance is located, a natural gas stream in which benzo-a-pyrene has been concentrated at sufficient levels to be a health threat within a natural gas gathering and distributing network connected to the customer's gas appliance comprising the steps of: (a) introducing the natural gas stream to a filter selected from a group that includes impingement, absorbing and adsorbing media whereby benzo-a-pyrene concentrated in the gas stream at sufficient levels to be a health threat due to aperiodic loading within the natural gas gathering and distributing network, is filtered from the gas stream and captured irrespective of mode of transport, (b) passing the filtered natural gas stream to the customer's gas appliance wherein safe use of the energy associated with the stream occurs.
Claim 10
Independent Claim
140 words
A method of filtering adjacent to an end-user-customer's residence or business in which at least a single gas appliance is located, a natural gas stream in which benzo-a-pyrene has been concentrated at sufficient levels to be a health threat within a natural gas gathering and distributing network connected to the customer's gas appliance comprising the steps of: (a) introducing the natural gas stream to a filter selected from a group that includes impingement, absorbing and adsorbing media whereby benzo-a-pyrene concentrated in the gas stream at sufficient levels to be a health threat due to aperiodic loading within the natural gas gathering and distributing network, is filtered from the gas stream and captured irrespective of mode of transport, (b) passing the filtered natural gas stream to the customer's gas appliance wherein safe use of the energy associated with the stream occurs.
Claim 11
Dependent Claim
39 words
The method of claim 8 with the additional steps of: (c) periodically and safely removing the filter of step (a) for disposing of captured benzo-a-pyrene, (d) inserting a new filter in place of the removed filter of step (c).
Claim 12
Dependent Claim
38 words
The method of claim 8 in which said impingement, absorbing and adsorbing media of step (a) for filtering benzo-a-pyrene is selected from the group comprising pleated filter paper, silica gel, open pore polyurethane foam and granular activated charcoal.
Claim 13
Dependent Claim
46 words
The method of claim 10 in which said impingement, absorbing and adsorbing media of step (a) comprises in seriatim, pleated filter paper, silica gel, open pore polyurethane foam and granular activated charcoal whereby benzo-a-pyrene is removed from the natural gas stream irrespective of mode of transport.
Claim 14
Dependent Claim
36 words
The method of claim 8 in which step (a) is further characterized by aperiodic loading of in situ benzo-a-pyrene being the result of gas phase transitional effects occuring within the natural gas gathering and distributing network.
Claim 15
Dependent Claim
70 words
The method of claim 12 in which step (a) is further characterized by the natural gas gathering and distributing network including compressor-driven equipment and multiple customer outlets operationally connected to such equipment and wherein step (a) is also characterized by clumping of in situ benzo-a-pyrene that is the result of dampening effects produced by the compressor-driven equipment and multiple customer outlet usage within the natural gas gathering and distributing network.
Claim 16
Dependent Claim
47 words
The method of claim 13 in which the natural gas gathering and distributing network includes gas meters each connected to one of the outlets of the network and wherein steps (a), (c) and (d) occur after the natural gas stream exits from the end user's gas meter.
Claim 17
Dependent Claim
21 words
The method of claim 13 in which steps (a), (c) and (d) occur within the natural gas gathering and distribution network.
References Cited (Backward Citations)
US3180010A
Cited
US2058919A
Cited
US2400180A
Cited
US2226045A
Cited
DE855750C
Cited
US2825424A
Cited
US3121756A
Cited
US3381454A
Cited
US3505794A
Cited
US3940471A
Cited
US3853516A
Cited
US3890121A
Cited
US4064876A
Cited
SU915913A1
Cited
GB2084897A
Cited
US4322230A
Cited
US4519816A
Cited
US4382440A
Cited
US4477270A
Cited
US4629479A
Cited
US4634458A
Cited
US4756724A
Cited
US4869832A
Cited
US4961764A
Cited
US4948504A
Cited
US4917862A
Cited
US4838901A
Cited
US4863494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |