Patent US4120018A successfully refreshed from Google Patents.
US4120018A
Expired / Lapsed
US
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Stop, tail and signal lamp
Assignee: Dominion Auto Accessories Ltd
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Filing: 1977-01-27
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Granted: 1978-10-10
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Expires: 1997-01-27
Abstract
Abstract A back-up lens for a stop, tail and signal lamp comprising a body of clear plastic material having an inner surface with dioptrics and catadioptrics thereon and an outer surface with cylindrical surfaces thereon.
Inventors
- 👤 Robert I. Nagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:12
CPC Classifications
F; F21; F21S; F21S43/00; F21S43/20; F21S43/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
A back-up lens for a stop and tail lamp which comprises a body of clear transparent material adapted to be mounted in vertical position in the lamp, said body comprising an inner surface and an outer surface and having a generally horizontal optical axis extending at a right angle to the plane thereof, said inner surface of said body having a plurality of parallel horizontally extending dioptrics above and below the optical axis of said body and a plurality of generally parallel horizontal catadioptrics below the dioptrics, at least one surface of each of said dioptrics is concave, the endmost portions of each dioptric and catadioptric are at an angle to the central portions thereof, said outer surface having a central convex cylindrical surface with the axis thereof extending generally parallel to the plane of said body and a plurality of concave cylindrical surfaces extending vertically on opposite sides of said convex cylindrical surface with the axes thereof generally parallel to the plane of said body.
Claim 2
Dependent Claim
166 words
A back-up lens for a stop and tail lamp which comprises a body of clear transparent material adapted to be mounted in vertical position in the lamp, said body comprising an inner surface and an outer surface and having a generally horizontal optical axis extending at a right angle to the plane thereof, said inner surface of said body having a plurality of parallel horizontally extending dioptrics above and below the optical axis of said body and a plurality of generally parallel horizontal catadioptrics below the dioptrics, at least one surface of each of said dioptrics is concave, the endmost portions of each dioptric and catadioptric are at an angle to the central portions thereof, said outer surface having a central convex cylindrical surface with the axis thereof extending generally parallel to the plane of said body and a plurality of concave cylindrical surfaces extending vertically on opposite sides of said convex cylindrical surface with the axes thereof generally parallel to the plane of said body.
Claim 3
Dependent Claim
41 words
The combination set forth in claim 1 wherein said body is in the form of an insert, a lens comprising a second body of transparent material comprising a smooth outer surface and having an opening in which said insert is placed.
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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |