Patent US4229082A successfully refreshed from Google Patents.
US4229082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective optical filter
Assignee: Individual
•
Filing: 1978-05-08
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Granted: 1980-10-21
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Expires: 1998-05-08
Abstract
Abstract A selective optical filter, intended to be placed before the eyes for protection and for improvement of vision, features a plurality of different light absorption zones comprising a central zone which is completely light permeable, or has low light absorption capability, a zone surrounding this central zone which is light permeable but has a relatively high light absorption capability, the said zone being included between the periphery of the central zone and a cone having its apex at the optical center of the eye and an included angle of between about 15° and 30°, and the outer periphery of the zone adjoining a further zone of low light absorption capability corresponding to the peripheral part of the retina.
Inventors
- 👤 Bernard A. Carreau
- 👤 Gabriel Lombard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/10; G02C7/105
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
A selective optical filter for use with eyes for the protection and improvement of the vision thereof, said filter comprising, a plurality of different light absorption zones, said zones including a central zone having a low light absorption capability, a second zone surrounding the central zone the second zone being light permeable and having a relatively high light absorption capability, and a third zone extending from at least a portion of the outer periphery of the second zone, the third zone having a low light absorption capability.
Claim 2
Dependent Claim
87 words
A selective optical filter for use with eyes for the protection and improvement of the vision thereof, said filter comprising, a plurality of different light absorption zones, said zones including a central zone having a low light absorption capability, a second zone surrounding the central zone the second zone being light permeable and having a relatively high light absorption capability, and a third zone extending from at least a portion of the outer periphery of the second zone, the third zone having a low light absorption capability.
Claim 3
Dependent Claim
16 words
A selective optical filter according to claim 1, wherein the central zone is completely light permeable.
Claim 4
Dependent Claim
25 words
A selective optical filter according to claim 1, wherein the second zone surrounding the central zone has a light absorption power between 30 and 80%.
Claim 5
Dependent Claim
21 words
A selective optical filter according to claim 1, wherein the second zone has a light absorption power between 50 and 75%.
Claim 6
Dependent Claim
40 words
A selective optical filter according to claim 1, wherein the central zone has a circular shape defined by a cone having its apex at the optical centre of the eye and a vertex angle of between about 5° to 8°.
Claim 7
Dependent Claim
54 words
A selective optical filter according to claim 1, wherein the central zone has an oval shape, the major axis being horizontal and subtending an angle of about 15° at the optical centre of the eye, and the minor axis subtending an angle of between 5° and 8° at the optical centre of the eye.
Claim 8
Dependent Claim
51 words
A selective optical filter according to claim 1, including a spectacle frame having the optical filter mounted therein, wherein the second zone extends as far as the nose-piece of the the spectacle frame and the second zone is adjacent to the third zone in the temporal portion of the spectacle frame.
Claim 9
Dependent Claim
21 words
A selective optical filter as set forth in claim 1 wherein the transition between the second and third zones is progressive.
References Cited (Backward Citations)
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |