Patent US3788485A successfully refreshed from Google Patents.
US3788485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain guard for contact lens
Assignee: Individual
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Filing: 1972-07-20
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Granted: 1974-01-29
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Expires: 1992-07-20
Abstract
Abstract A flexible contact lens drain guard having a ring fabricated of rubber or plastic or the like. A mesh net extends across the ring opening and is bonded to or formed unitarily with the ring. Suction means are formed on the base of the ring and extend around its circumference.
Inventors
- 👤 L Bruning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/26; E03C1/264
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A drain guard for temporarily blocking the drain opening in a sink or the like to prevent a contact lens from being lost down the drain while handled over the sink by its user but permitting the flow of liquid down the drain, comprising: a. a narrow rim fabricated of flexible material so that it can easily be deformed from a normal, annular ring shape to conform to the surface contour of the sink as well as be deformed for storage, b. an open, uncovered screen fabricated of flexible material, so that it can easily be deformed, extending across the opening within the annular ring and secured around its periphery to the ring, and c. suction means extending around the lower surface of said ring for gripping, by suction, the surface of the sink surrounding the sink opening, d. said suction means being so constructed and arranged that a contact lens cannot slip between said ring and the sink surface to be lost down the drain.
Claim 2
Dependent Claim
166 words
A drain guard for temporarily blocking the drain opening in a sink or the like to prevent a contact lens from being lost down the drain while handled over the sink by its user but permitting the flow of liquid down the drain, comprising: a. a narrow rim fabricated of flexible material so that it can easily be deformed from a normal, annular ring shape to conform to the surface contour of the sink as well as be deformed for storage, b. an open, uncovered screen fabricated of flexible material, so that it can easily be deformed, extending across the opening within the annular ring and secured around its periphery to the ring, and c. suction means extending around the lower surface of said ring for gripping, by suction, the surface of the sink surrounding the sink opening, d. said suction means being so constructed and arranged that a contact lens cannot slip between said ring and the sink surface to be lost down the drain.
Claim 3
Dependent Claim
26 words
The drain guard of claim 1 further characterized in that: a. in its normal configuration said screen lies substantially in a plane co-extensive with said ring.
Claim 4
Dependent Claim
45 words
The drain guard of claim 2 further characterized in that: a. said suction means comprise a plurality of individual suction cups annularly spaced at predetermined intervals less than the width of a contact lens around the entire circumference of the lower surface of said ring.
Claim 5
Dependent Claim
30 words
The drain guard of claim 2 further characterized in that: a. said suction means comprise a continuous trough extending around the entire circumference of the lower surface of said ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |