Patent US5409526A successfully refreshed from Google Patents.
US5409526A
Expired / Lapsed
US
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Apparatus for supplying high purity fluid
Assignee: Air Products and Chemicals Inc
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Filing: 1993-10-05
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Granted: 1995-04-25
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Expires: 2013-10-05
Abstract
Abstract An apparatus for supplying high purity gas comprises a cylinder having a valve with two internal ports. One internal port is used to fill the cylinder while the other is fitted with a unit which removes particulates and impurities from the gas as it leaves the cylinder. The unit comprises an inlet, a first filter for removing coarse particulates, layers of adsorbent and absorbent for removing impurities, and a second filter for removing fine particulates. The purified gas leaves the cylinder via the valve and after passing through a regulator, a flow control device and various lengths of tubing passes through a conventional purifier immediately upstream of the point of use. The apparatus reduces the load on the purifier and hence decreases the frequency at which the purifier has to be recharged. Potentially the apparatus could obviate the need for the purifier altogether.
Inventors
- 👤 Dao-Hong Zheng
- 👤 John Irven
- 👤 Alan J. F. Paterson
- 👤 Daniel C. Tregear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:53
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0415; F; F17; F17C; F17C13/00; F17C13/002; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2259/00; B01D2259/45; B01D2259/4525; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/0119; F17C2201/03; F17C2201/032; F17C2201/05; F17C2201/058; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0329; F17C2205/0335; F17C2205/0338; F17C2205/0341; F17C2205/0382; F17C2205/0388; F17C2205/0391; F17C2221/00; F17C2221/05; F17C2223/00; F17C2223/01; F17C2223/0107; F17C2223/0123; F17C2270/00; F17C2270/05; F17C2270/0518
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
An apparatus for supplying high purity fluid, which apparatus comprises a cylinder having a valve, said valve adapted to close said cylinder and having means for filling and removing fluid from said cylinder via two internal ports connected to said means for filling and removing of fluid, and a unit connected to one of said ports said unit containing a substance selected from the group consisting of adsorbents, absorbents and mixtures thereof, whereby impurities are removed from said fluid as it is withdrawn from said cylinder through said unit.
Claim 2
Independent Claim
89 words
An apparatus for supplying high purity fluid, which apparatus comprises a cylinder having a valve, said valve adapted to close said cylinder and having means for filling and removing fluid from said cylinder via two internal ports connected to said means for filling and removing of fluid, and a unit connected to one of said ports said unit containing a substance selected from the group consisting of adsorbents, absorbents and mixtures thereof, whereby impurities are removed from said fluid as it is withdrawn from said cylinder through said unit.
Claim 3
Dependent Claim
17 words
An apparatus as claimed in claim 1, including a catalyst to enhance the operation of said means.
Claim 4
Dependent Claim
80 words
An apparatus as claimed in claim 1 wherein the second of said two internal ports opens directly into said cylinder and which apparatus further comprises a filling valve member for permitting and preventing fluid flowing from said means for filling and removing of fluid to the second of said two internal ports and a discharge valve member for permitting and preventing fluid flow from the first of said two internal ports to said means for filling and removing of fluid.
Claim 5
Dependent Claim
46 words
An apparatus as claimed in claim 3 which further comprises a filling adaptor which, when inserted in said means for filling and removing of fluid, prevents fluid from flowing from said means for filling and removing of fluid to the first of said two internal ports.
Claim 6
Dependent Claim
46 words
An apparatus as claimed in claim 3 which further comprises a discharge adaptor which, when inserted in said means for filling and removing of fluid, prevents fluid from flowing from the second of said two internal ports to said means for filling and removing of fluid.
References Cited (Backward Citations)
DE129169C
Cited
US1821549A
Cited
US2031164A
Cited
US2284147A
Cited
US2548335A
Cited
US2722105A
Cited
US3169112A
Cited
US3976050A
Cited
US4032311A
Cited
US4146277A
Cited
JPS5539208A
Cited
GB2078128A
Cited
US4483461A
Cited
WO1986007553A1
Cited
JPS62161095A
Cited
JPS6351918A
Cited
US5041147A
Cited
US5238469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-24 | 1998-10-24 | 1999-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-24 | 2002-10-24 | 2003-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-24 | 2006-10-24 | 2007-04-25 | $7700.00 | Window Closed / Lapsed |