Patent FR474418A successfully refreshed from Google Patents.
US4530571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror
Assignee: Clearplas Ltd
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Filing: 1983-03-01
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Granted: 1985-07-23
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Expires: 2003-03-01
Abstract
Abstract A mirror made of a synthetic plastics material in the shape of a shallow tray having a base which is metallized on its internal or external surface. The shallow tray has a rim integral with the periphery of the base. The shape of the cross-section of the rim enables the peripheral edge at the front of the mirror to be convexly rounded to a required radius greater than the thickness of the base. The shape of the cross-section of the rim also serves to hold the base from distortion and so maintains the optical properties of the mirror.
Inventors
- 👤 John Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:14
CPC Classifications
B; B60; B60R; B60R1/00; B60R1/02; B60R1/04; G; G02; G02B; G02B7/00; G02B7/18; G02B7/182
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively; wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base, such that, together, the peripherally-inner wall portion, the crest portion and the peripherally-outer wall portion form a U-shape, the thickness of said rim extending substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion.
Claim 2
Dependent Claim
159 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively; wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base, such that, together, the peripherally-inner wall portion, the crest portion and the peripherally-outer wall portion form a U-shape, the thickness of said rim extending substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion.
Claim 3
Dependent Claim
30 words
A mirror as claimed in claim 1 in which the thickness of said rim extends substantially uniformly throughout said rim and said base throughout the whole area of said base.
Claim 4
Dependent Claim
210 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively; wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base; wherein the thickness of said rim extends substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion; and wherein said base has a marginal portion adjacent said rim, the thickness of said rim and said marginal portion being substantially uniform throughout, and a remaining portion within said marginal portion which is thicker than said marginal portion and said rim, said remaining portion provided by a stepped forward front face extending throughout the whole area of said remaining portion of said base within said marginal portion.
Claim 5
Dependent Claim
210 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively; wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base; wherein the thickness of said rim extends substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion; and wherein said base has a marginal portion adjacent said rim, the thickness of said rim and said marginal portion being substantially uniform throughout, and a remaining portion within said marginal portion which is thicker than said marginal portion and said rim, said remaining portion provided by a stepped forward front face extending throughout the whole area of said remaining portion of said base within said marginal portion.
Claim 6
Dependent Claim
212 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively; wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base; wherein the thickness of said rim extends substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion; wherein said base has a marginal portion adjacent said rim, the thickness of said rim and said marginal portion being substantially uniform throughout, and a remaining portion within said marginal portion which is thicker than said marginal portion and said rim; and wherein said remaining portion is provided by a stepped rearward rear face extending throughout the whole area of said remaining portion of said base within said marginal portion.
Claim 7
Dependent Claim
212 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively; wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base; wherein the thickness of said rim extends substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion; wherein said base has a marginal portion adjacent said rim, the thickness of said rim and said marginal portion being substantially uniform throughout, and a remaining portion within said marginal portion which is thicker than said marginal portion and said rim; and wherein said remaining portion is provided by a stepped rearward rear face extending throughout the whole area of said remaining portion of said base within said marginal portion.
Claim 8
Dependent Claim
219 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively, wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base; wherein the thickness of said rim extends substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion; wherein said base has a marginal portion adjacent said rim, the thickness of said rim and said marginal portion being substantially uniform throughout, and a remaining portion within said marginal portion which is thicker than said marginal portion and said rim; and wherein said remaining portion is provided by a stepped forward front face and a stepped rearward rear face each extending throughout the whole area of said remaining portion of said base within said marginal portion.
Claim 9
Dependent Claim
219 words
A mirror made of a synthetic plastics material comprising: a base having front and back surfaces, which each define a plane, and a peripheral edge; a rim upstanding from said base around the whole of said peripheral edge; and a metallised layer on one of said front and back surfaces of said base to provide second or first surface reflection respectively, wherein said rim has a peripherally-inner wall portion extending forwardly from said base, a crest portion defining a front peripheral convex face having a radius of curvature greater than the thickness of said base, and a peripherally-outer wall portion spaced from said peripherally-inner wall portion and terminating in substantially the same plane as said back surface of said base; wherein the thickness of said rim extends substantially uniformly throughout said peripherally-inner wall portion, said crest portion and said peripherally-outer wall portion; wherein said base has a marginal portion adjacent said rim, the thickness of said rim and said marginal portion being substantially uniform throughout, and a remaining portion within said marginal portion which is thicker than said marginal portion and said rim; and wherein said remaining portion is provided by a stepped forward front face and a stepped rearward rear face each extending throughout the whole area of said remaining portion of said base within said marginal portion.
References Cited (Backward Citations)
GB1066839A
Cited
US4306770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |