US4545492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for maintaining dry conditions in vessels
Assignee: Individual
•
Filing: 1984-04-27
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Granted: 1985-10-08
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Expires: 2004-04-27
Abstract
Abstract This invention relates to a device for maintaining vessels substantially free of moisture. The device is a cap or stopper having a hollow section to contain a drying agent, a nonporous top member having at least one pinhole therein and a porous bottom member.
Inventors
- 👤 Raymond A. Firestone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:37
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/24; B65D51/28; B65D51/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
A cover device for maintaining dry conditions in vessels which comprises: (a) a member made of a porous material; (b) a member made of a non-porous material having at least one pinhole therein wherein the pinhole has an equivalent area as if it had a diameter of from 0.01 to 0.2 mm.; (c) a hollow portion between the members (a) and (b); and (d) means on the cover device for attaching said cover device to a vessel such that the member (a) communicates with the interior of the vessel.
Claim 2
Dependent Claim
89 words
A cover device for maintaining dry conditions in vessels which comprises: (a) a member made of a porous material; (b) a member made of a non-porous material having at least one pinhole therein wherein the pinhole has an equivalent area as if it had a diameter of from 0.01 to 0.2 mm.; (c) a hollow portion between the members (a) and (b); and (d) means on the cover device for attaching said cover device to a vessel such that the member (a) communicates with the interior of the vessel.
Claim 3
Dependent Claim
13 words
A cover device of claim 1 wherein said hollow portion contains a desiccant.
Claim 4
Dependent Claim
22 words
A cover device of claims 1 or 2 wherein the member made of porous material is permanently attached to said cover device.
Claim 5
Dependent Claim
16 words
A cover device of claim 3 wherein said member made of porous material is sintered glass.
Claim 6
Dependent Claim
20 words
A cover device of claim 4 wherein the member made of non-porous material is removably attached to said cover device.
Claim 7
Dependent Claim
22 words
The cover device of claim 1 wherein the pinhole(s) are circular and have a diameter of from 0.01 mm to 0.2 mm.
Claim 8
Dependent Claim
88 words
A cover device having an underside and a top side, in the form of a glass stopper comprising (a) a sintered glass on the underside of said cover device; (b) a removable topside made of non-porous material on the opposite end of said underside, said topside having one or more pinholes therein, wherein the pinhole has an equivalent area as if it had a diameter of from 0.01 to 0.2 mm.; and (c) a hollow center portion between topside made of non-porous material and the sintered glass underside.
Claim 9
Dependent Claim
88 words
A cover device having an underside and a top side, in the form of a glass stopper comprising (a) a sintered glass on the underside of said cover device; (b) a removable topside made of non-porous material on the opposite end of said underside, said topside having one or more pinholes therein, wherein the pinhole has an equivalent area as if it had a diameter of from 0.01 to 0.2 mm.; and (c) a hollow center portion between topside made of non-porous material and the sintered glass underside.
Claim 10
Dependent Claim
78 words
A screw cap having threads therein on one end, a top portion at the other end and a hollow portion in between comprising; (a) member made of porous material near the end of the thread closest to the hollow portion separating said top portion from the threads; and (b) one or more pinholes on the top portion of said cap, said pinhole having an equivalent area as if it had a diameter of from 0.01 to 0.2 mm.
Claim 11
Dependent Claim
78 words
A screw cap having threads therein on one end, a top portion at the other end and a hollow portion in between comprising; (a) member made of porous material near the end of the thread closest to the hollow portion separating said top portion from the threads; and (b) one or more pinholes on the top portion of said cap, said pinhole having an equivalent area as if it had a diameter of from 0.01 to 0.2 mm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |