US5178779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for protecting against chemical splashing due to breakage of disk filters
Assignee: Rohm and Haas Co
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Filing: 1991-01-02
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Granted: 1993-01-12
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Expires: 2011-01-02
Abstract
Abstract Method and device for protecting against chemical spills due to breakage of disk filters use to filter chemicals comprising (A) a base having an upper surface with at least one vial well or groove adapted to allow sample vials to be inserted and to support said vials during a filter operation, said base having a front vertical shield portion at least as high as the top of the sample vials when said vials are inserted; (B) a rack having a rear side with at least one slot, each of said slots adapted to slidably engage the disk filter portion of a filter syringe apparatus and to prevent said disk filter from bursting during a filter operation, each of said slots positioned in said rack so that when said rack is fit on said base, every male portion of every disk filter which is engaged in one of said slots fits in a corresponding sample vial inserted in the corresponding vial well or groove.
Inventors
- 👤 Kevin F. Gironda
- 👤 Francis T. Letterio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:48
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/4077; B; B01; B01D; B01D35/00; B01D35/30; B01D35/31; B01L; B01L9/00; B01L9/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
244 words
Device for protecting against chemical spills due to breakage of disk filters used to filter chemicals comprising (A) a base having an upper surface with at least one vial well or groove adapted to allow sample vials to be inserted and to support said vials during a filter operation, said base having a front vertical shield at least as high as the top of the sample vials when said vials are inserted; (B) a rack having a rear side with at least one horizontal slot approximately the width and height of a disk filter, said horizontal slot adapted to slidably engage the disk filter portion of a filter syringe apparatus and to prevent said disk filter from bursting during a filter operation, said horizontal slot having a left side and a right side and an open vertical portion midway between said left side and said right side, said vertical portion approximately the width of a syringe and in a position such that when a filter disk with syringe attached is inserted in said rack from said rear side, said syringe fits within said vertical portion and said disk slidably engages said horizontal portion, each of said slots positioned in said rack so that when said rack is fit on said base, every male portion of every syringe attached to every disk filter which is engaged in one of said slots fits in a corresponding sample vial inserted in the corresponding vial well or groove.
Claim 2
Dependent Claim
244 words
Device for protecting against chemical spills due to breakage of disk filters used to filter chemicals comprising (A) a base having an upper surface with at least one vial well or groove adapted to allow sample vials to be inserted and to support said vials during a filter operation, said base having a front vertical shield at least as high as the top of the sample vials when said vials are inserted; (B) a rack having a rear side with at least one horizontal slot approximately the width and height of a disk filter, said horizontal slot adapted to slidably engage the disk filter portion of a filter syringe apparatus and to prevent said disk filter from bursting during a filter operation, said horizontal slot having a left side and a right side and an open vertical portion midway between said left side and said right side, said vertical portion approximately the width of a syringe and in a position such that when a filter disk with syringe attached is inserted in said rack from said rear side, said syringe fits within said vertical portion and said disk slidably engages said horizontal portion, each of said slots positioned in said rack so that when said rack is fit on said base, every male portion of every syringe attached to every disk filter which is engaged in one of said slots fits in a corresponding sample vial inserted in the corresponding vial well or groove.
Claim 3
Dependent Claim
15 words
Device according to claim 1 wherein said rack is adapted to removably engage said base.
Claim 4
Dependent Claim
31 words
Device according to claim 1 wherein said rack and said base are hinged so that said rack can be rotated away from said base for removal and insertion of disk filters.
Claim 5
Dependent Claim
22 words
Device according to claim 1 wherein said rack has two or more slots and said base has a corresponding number of grooves.
Claim 6
Dependent Claim
27 words
Device according to claim 1 wherein said rack has at least five slots and said base has a corresponding number and location of vial wells or grooves.
Claim 7
Dependent Claim
248 words
Method of filtering using a disk filter-syringe apparatus so as to avoid spilling or splashing due to bursting of disk filter comprising (A) sliding one or more disk filters of said disk filter-syringe apparatus in one or more slots of a second apparatus for protecting against chemical spills due to breakage of disk filters comprising a base having an upper surface with at least one vial well or groove adapted to allow sample vials to be inserted and to support said vials during a filter operation, said base having a front vertical shield at least as high as the top of the sample vials when said vials are inserted; and a rack having a rear side with one or more slots, each adapted to slidably engage the disk filter portion of a filter syringe apparatus and to prevent said disk filter from bursting during a filter operation, each of said slots positioned in said rack so that when said rack is fit on said base, every male portion of every disk filter which is engaged in one of said slots fits in a corresponding sample vial inserted in the corresponding vial well or groove; (B) inserting one or more vials in the vial wells or grooves of the base of said device; (C) fitting the rack on the base so that the male portions of every disk filter fit in a corresponding sample vial; and (D) compressing said syringes to filter the chemical samples into the corresponding vials.
Claim 8
Dependent Claim
248 words
Method of filtering using a disk filter-syringe apparatus so as to avoid spilling or splashing due to bursting of disk filter comprising (A) sliding one or more disk filters of said disk filter-syringe apparatus in one or more slots of a second apparatus for protecting against chemical spills due to breakage of disk filters comprising a base having an upper surface with at least one vial well or groove adapted to allow sample vials to be inserted and to support said vials during a filter operation, said base having a front vertical shield at least as high as the top of the sample vials when said vials are inserted; and a rack having a rear side with one or more slots, each adapted to slidably engage the disk filter portion of a filter syringe apparatus and to prevent said disk filter from bursting during a filter operation, each of said slots positioned in said rack so that when said rack is fit on said base, every male portion of every disk filter which is engaged in one of said slots fits in a corresponding sample vial inserted in the corresponding vial well or groove; (B) inserting one or more vials in the vial wells or grooves of the base of said device; (C) fitting the rack on the base so that the male portions of every disk filter fit in a corresponding sample vial; and (D) compressing said syringes to filter the chemical samples into the corresponding vials.
References Cited (Backward Citations)
US4284603A
Cited
US4642220A
Cited
US4346057A
Cited
US4832842A
Cited
US4925630A
Cited
US4963493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |