US4190322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnifying means
Assignee: Individual
•
Filing: 1977-09-01
•
Granted: 1980-02-26
•
Expires: 1997-09-01
Abstract
Abstract A magnifying apparatus comprising a pair of mutually adjustable complementary magnifying elements wherein one of the elements is an elongated member having one flat surface and one transversely arcuate surface, and the other element is of a circular configuration having at least one convex surface.
Inventors
- 👤 Stewart W. Wortley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:30
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/002; G02B25/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
82 words
Magnifying means comprising a first magnifying element constructed of a plastic material which magnifies in one direction only and having one flat surface and one arcuate surface oppositely disposed with respect thereto, a second magnifying element having at least one arcuate surface and which magnifies in all directions for cooperating with the first magnifying element and means for infinitely varying both of said elements with respect to spacing and angular orientation therebetween for facilitating focusing and to produce relatively high power magnification.
Claim 2
Dependent Claim
82 words
Magnifying means comprising a first magnifying element constructed of a plastic material which magnifies in one direction only and having one flat surface and one arcuate surface oppositely disposed with respect thereto, a second magnifying element having at least one arcuate surface and which magnifies in all directions for cooperating with the first magnifying element and means for infinitely varying both of said elements with respect to spacing and angular orientation therebetween for facilitating focusing and to produce relatively high power magnification.
Claim 3
Dependent Claim
52 words
Magnifying means as set forth in claim 1 wherein the first of said magnifying elements comprises an elongated transparent bar having one flat surface and one convex surface, and the second of said magnifying elements is substantially disc shaped having a flat surface and a convex surface oppositely disposed with respect thereto.
Claim 4
Dependent Claim
27 words
Magnifying means as set forth in claim 1 wherein said second magnifying element is substantially disc shaped with the opposite sides thereof being of a convex configuration.
Claim 5
Dependent Claim
37 words
Magnifying means as set forth in claim 1 wherein the first magnifying element is severed from a cylinder having a relatively large diameter whereby the arcuate surface is a portion of the outer periphery of the cylinder.
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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |