US4572622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct opposite reverse refractor
Assignee: Individual
•
Filing: 1984-07-30
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Granted: 1986-02-25
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Expires: 2004-07-30
Abstract
Abstract This invention consists of a geometrically patterned lens for primary uses in the field of image projection and refraction.
Inventors
- 👤 David Sterner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:48
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A lens structure capable of casting an upright and unreversed image, comprising: a. an arcuately-shaped bubble of transparent material having a rectangularly-bordered base, wherein: 1. said bubble is severed equilaterally, forming two directly opposing halves; 2. said halves being placed in a back-to-back and reversed position with respect to each other, and being rejoined to form a skewed-barrel-shaped lens structure having an opening at each end; and 3. one of said openings at said ends being sealed and said lens structure then being filled with a refractive liquid material, such that the surface of said refractive liquid material forms a flat reflective surface.
Claim 2
Dependent Claim
103 words
A lens structure capable of casting an upright and unreversed image, comprising: a. an arcuately-shaped bubble of transparent material having a rectangularly-bordered base, wherein: 1. said bubble is severed equilaterally, forming two directly opposing halves; 2. said halves being placed in a back-to-back and reversed position with respect to each other, and being rejoined to form a skewed-barrel-shaped lens structure having an opening at each end; and 3. one of said openings at said ends being sealed and said lens structure then being filled with a refractive liquid material, such that the surface of said refractive liquid material forms a flat reflective surface.
Claim 3
Dependent Claim
12 words
The lens structure of claim 1, wherein said transparent material is PLEXIGLAS.
Claim 4
Dependent Claim
13 words
The lens structure of claim 1, wherein said refractive liquid material is water.
Claim 5
Dependent Claim
13 words
The lens structure of claim 3, wherein said refractive liquid material is water.
References Cited (Backward Citations)
US2490873A
Cited
US2979997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-24 | 1989-08-26 | 1990-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-24 | 1993-08-26 | 1994-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-24 | 1997-08-26 | 1998-02-25 | $7700.00 | Window Closed / Lapsed |