Patent US4455557A successfully refreshed from Google Patents.
US4455557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dished reflector and method of making same
Assignee: Individual
•
Filing: 1982-06-02
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Granted: 1984-06-19
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Expires: 2002-06-02
Abstract
Abstract A reflector and a method of making a reflector, the reflector having a dished reflecting surface, a series of slot formations, the extended longitudinal axis of each slot formation being curved and radiating from the center area of the reflecting surface and through the outer edge of the reflecting surface, the material of the reflector laterally of the extended longitudinal axes of said slot formations adjacent at least one end of the slot formations being folded adjacent the extended axes of the slot formations.
Inventors
- 👤 John Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:18
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/005; H01Q15/00; H01Q15/14; H01Q15/16; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49016
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A method of making a dished reflector comprising the steps of: forming a blank from a piece of blank press formable stock; cutting a series of slot formations in said blank, the extended longitudinal axis of each slot formation radiating generally from the centre area of the blank through the outer edge of the blank; pressing the blank into the shape of a dished reflector and simultaneously folding the material of the blank laterally of the extended longitudinal axes of said slot formations adjacent at least one end of the slot formations whereby to narrow the width of the slot formation.
Claim 2
Independent Claim
101 words
A method of making a dished reflector comprising the steps of: forming a blank from a piece of blank press formable stock; cutting a series of slot formations in said blank, the extended longitudinal axis of each slot formation radiating generally from the centre area of the blank through the outer edge of the blank; pressing the blank into the shape of a dished reflector and simultaneously folding the material of the blank laterally of the extended longitudinal axes of said slot formations adjacent at least one end of the slot formations whereby to narrow the width of the slot formation.
Claim 3
Dependent Claim
37 words
A method of making a dished reflector as claimed in claim 1 in which the longitudinal axes of said slots extend radially of the centre of said blank, said material being folded as aforesaid into U-shaped ribs.
Claim 4
Dependent Claim
42 words
A method of making a dished reflector as claimed in claim 2 in which the longitudinal axes of said slots extend radially of the centre of said blank, said U-shaped ribs being formed only adjacent the outer end of said radial slots.
Claim 5
Dependent Claim
61 words
A method of making a dished reflector as claimed in claim 2 in which said slot formations comprise a plurality of distant slots along the longitudinal axes of their respective slot formations, the metal of the blank laterally of the longitudinal axes of the slot formations between the distinct slots of a slot formation being formed to a U-shape as aforesaid.
Claim 6
Dependent Claim
83 words
A dished reflector formed from a blank of formable material comprising: a dished reflecting surface; a series of slot formations, the extended longitudinal axis of each slot formation being curved and radiating from the centre area of the reflecting surface and through the outer edge of the reflecting surface; the material of the reflector laterally of the extended longitudinal axes of said slot formations adjacent at least one end of the slot formations being folded adjacent the extended axes of the slot formations.
Claim 7
Dependent Claim
83 words
A dished reflector formed from a blank of formable material comprising: a dished reflecting surface; a series of slot formations, the extended longitudinal axis of each slot formation being curved and radiating from the centre area of the reflecting surface and through the outer edge of the reflecting surface; the material of the reflector laterally of the extended longitudinal axes of said slot formations adjacent at least one end of the slot formations being folded adjacent the extended axes of the slot formations.
Claim 8
Dependent Claim
50 words
A dished reflector as claimed in claim 5 wherein the material of the reflector laterally of the extended longitudinal axes of said slot formations adjacent at least one end of the slot formations is folded as aforesaid to form a U-shaped rib about the extended axes of the slot formations.
Claim 9
Dependent Claim
23 words
A dished reflector as claimed in claim 6 wherein said U-shaped ribs are formed only adjacent the outer end of said radial slots.
References Cited (Backward Citations)
US2181181A
Cited
US2423863A
Cited
US2460869A
Cited
US3521837A
Cited
US3618185A
Cited
US4021817A
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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) | 1987-06-19 | 1987-12-19 | 1988-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-19 | 1991-12-19 | 1992-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-19 | 1995-12-19 | 1996-06-19 | $7700.00 | Window Closed / Lapsed |