US3682558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen filter
Assignee: American Bank Note Co
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Filing: 1970-03-18
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Granted: 1972-08-08
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Expires: 1990-03-18
Abstract
Abstract An apparatus for dispensing a powder-like mixture with a hollow tube for containing the mixture, a porous tip sealing the tube so that the material is dispensed through the tip when it is deformed by being pressed against a substantially unyielding surface and a screen mounted in the tube adjacent the tip for keeping the bulk of the mixture away from the tip and thus preventing leaking of the mixture in the region between the screen and tip when liquid material is drawn into the tip member after the tip is pressed against a wet surface.
Inventors
- 👤 Hobson Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:58
CPC Classifications
B; B65; B65D; B65D47/00; B65D47/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
Apparatus for dispensing a powder-like mixture comprising: a hollow body member for containing said mixture having an open end, a deformable, porous tip member sealing said open end so that said mixture is dispensed through said tip member when said tip member is deformed by being pressed against a substantially unyielding surface, and a screen mounted in said body member separated from and adjacent said tip member so as to bound a region between said screen and said tip member for permitting amounts of mixture to move through said screen to said tip member, but preventing said mixture from building up in said region between said screen and said tip member to a density which is the same as the density in the regions adjacent the side of said screen means remote from said tip and thus preventing caking of said mixture in said region between said screen means and said tip member when liquid material has been drawn into said tip member by being pressed against a surface having liquid material associated therewith.
Claim 2
Dependent Claim
174 words
Apparatus for dispensing a powder-like mixture comprising: a hollow body member for containing said mixture having an open end, a deformable, porous tip member sealing said open end so that said mixture is dispensed through said tip member when said tip member is deformed by being pressed against a substantially unyielding surface, and a screen mounted in said body member separated from and adjacent said tip member so as to bound a region between said screen and said tip member for permitting amounts of mixture to move through said screen to said tip member, but preventing said mixture from building up in said region between said screen and said tip member to a density which is the same as the density in the regions adjacent the side of said screen means remote from said tip and thus preventing caking of said mixture in said region between said screen means and said tip member when liquid material has been drawn into said tip member by being pressed against a surface having liquid material associated therewith.
Claim 3
Dependent Claim
17 words
Apparatus as in claim 1 wherein said mixture is comprised of enzyme crystals and a chalky powder.
Claim 4
Dependent Claim
13 words
Apparatus as in claim 1 wherein said tip member is comprised of foam.
Claim 5
Dependent Claim
43 words
Apparatus as in claim 1 wherein said body member includes a first member having an open end and a second tubular member mounted in the open end of said first member, said screen and said tip member being attached to said second member.
Claim 6
Dependent Claim
131 words
In a container for dispensing a powder-like mixture from the interior of said container through a porous tip member when said tip is deformed by being pressed manually against a substantially unyielding surface, the improvement comprising screen means mounted between said interior of said container and separated and adjacent from said tip member so as to bound a region betweeN said screen and said tip member for preventing said mixture from building up in the region between said tip member and said screen means to the same density as in the regions adjacent the side of said screen means remote from said tip member and thus preventing caking of said mixture in said region between said screen means and said tip member when said surface has associated with it liquid material.
Claim 7
Dependent Claim
131 words
In a container for dispensing a powder-like mixture from the interior of said container through a porous tip member when said tip is deformed by being pressed manually against a substantially unyielding surface, the improvement comprising screen means mounted between said interior of said container and separated and adjacent from said tip member so as to bound a region betweeN said screen and said tip member for preventing said mixture from building up in the region between said tip member and said screen means to the same density as in the regions adjacent the side of said screen means remote from said tip member and thus preventing caking of said mixture in said region between said screen means and said tip member when said surface has associated with it liquid material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |